<PAGE>   1
                         ------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                         ------------------------------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                         ------------------------------


                                    C3, INC.
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


<TABLE>
<CAPTION>

                                           3800 GATEWAY BOULEVARD, SUITE 310
     NORTH CAROLINA                        MORRISVILLE, NORTH CAROLINA 27560                     56-0308470
- -------------------------------        ---------------------------------------             ----------------------
<S>                                    <C>                                                 <C>
(State or other jurisdiction of        (Address of principal executive offices)               (I.R.S. Employer
incorporation or organization)                                                             Identification Number)
</TABLE>


                            1996 STOCK OPTION PLAN OF
                                    C3, INC.

                           1997 OMNIBUS STOCK PLAN OF
                                    C3, INC.
                            -------------------------
                            (Full title of the plans)

                            -------------------------
                                 Jeff N. Hunter
                                    President
                                    C3, Inc.
                        3800 Gateway Boulevard, Suite 310
                        Morrisville, North Carolina 27560
                                 (919) 468-0399
            ---------------------------------------------------------
            (Name, address and telephone number, including area code,
                              of agent for service)

                         CALCULATION OF REGISTRATION FEE


<TABLE>
<CAPTION>

                                                  PROPOSED             PROPOSED
TITLE OF                                          MAXIMUM              MAXIMUM
SECURITIES             AMOUNT                     OFFERING             AGGREGATE             AMOUNT OF
TO BE                  TO BE                      PRICE                OFFERING              REGISTRATION
REGISTERED             REGISTERED                 PER SHARE(1)         PRICE(1)              FEE(1)
- ----------             ----------                 ------------         ---------             ------------
<S>                    <C>                          <C>                <C>                   <C>   
Common Stock,
no par value           1,377,045 shares           $1.88-$15.00         $12,100,708           $3,570
</TABLE>


- ----------------
(1) Pursuant to Rule 457(c) and (h)(1), based on (i) the average option price
($3.95) for shares available for issuance upon exercise of outstanding options
granted pursuant to the 1996 Stock Option Plan of C3, Inc. (661,791 shares);
(ii) the average option price ($14.61) for shares available for issuance upon
exercise of outstanding options granted pursuant to the 1997 Omnibus Stock Plan
of C3, Inc. (477,000 shares); (iii) the average ($12.1875) of the high ($12.50)
and low ($11.875) sale prices of the registrant's common stock on December 29,
1997, as reported by the Nasdaq National Market, with respect to shares
available for future issuance pursuant to the 1997 Omnibus Stock Plan of C3,
Inc. (200,979 shares); and (iv) the average option price ($1.88) for shares
available for issuance upon exercise of outstanding options granted by the
registrant to consultants performing services on behalf of the Company prior to
the adoption of either the 1996 Stock Option Plan of C3, Inc. or the 1997
Omnibus Stock Plan of C3, Inc. (37,275 shares).


                         ------------------------------

<PAGE>   2

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

         The following documents filed by C3, Inc. (the "Company") with the
Securities and Exchange Commission (the "Commission") are incorporated herein by
reference:

                  (a) The Company's Prospectus dated November 14, 1997, filed
         with the Commission on November 17, 1997.

                  (b) The description of the Company's Common Stock, no par
         value, contained in the Company's Registration Statement on Form 8-A,
         filed pursuant to Section 12(g) of the Securities Exchange Act of 1934
         (the "Exchange Act") with the Commission on November 7, 1997, including
         any amendment or report filed for the purpose of updating such
         description.

                  (c) All other reports filed pursuant to Section 13(a) or 15(d)
         of the Exchange Act since the end of the period referred to in (a),
         above.

         All documents subsequently filed by the Company pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act prior to the filing of a
post-effective amendment which indicates that all securities offered hereby have
been sold or which deregisters all securities remaining unsold shall be deemed
to be incorporated by reference herein and to be a part hereof from the date of
the filing of such documents.

ITEM 4.  DESCRIPTION OF SECURITIES.

         Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

         The legality of the securities offered hereby has been passed upon by
the firm of Womble Carlyle Sandridge & Rice, PLLC, counsel to the Company. One
of the members of Womble Carlyle Sandridge & Rice, PLLC holds 10,650 shares of
Common Stock, which were purchased from the Company in May 1996 in a private
placement transaction.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         Sections 55-8-50 through 55-8-58 of the North Carolina Business
Corporation Act contains specific provisions relating to indemnification of
directors and officers of North Carolina corporations. In general, such sections
provide that (i) a corporation must indemnify a director or officer who is
wholly successful in his defense of a proceeding to which he is a party because
of his status as such, unless limited by the articles of incorporation, and (ii)
a corporation may indemnify a director or officer if he is not wholly successful
in such defense and it is determined as provided by statute that the director or
officer meets a certain standard of conduct, but the corporation may not
indemnify a director or officer if he is liable to the corporation or is
adjudged liable on the basis that personal benefit was improperly received by
him. A director or officer of a corporation who is a party to a proceeding may
also apply to the courts for indemnification, and the court may order
indemnification under certain circumstances set forth in the statute. A
corporation may, in its articles of incorporation or bylaws or by contract or
resolution, provide indemnification in addition to that provided by statute,
subject to certain conditions.

         The Company's bylaws provide for the indemnification of any director or
officer of the Company against liabilities and litigation expenses arising out
of his status as such, excluding (i) any liabilities or litigation expenses
relating to activities which were at the time taken known or believed by such
person to be clearly in conflict with the best interest of the Company and (ii)
that portion of any liabilities or litigation expenses with respect to which
such person is entitled to receive payment under any insurance policy.




<PAGE>   3



         The Company's articles of incorporation provide for the elimination of
the personal liability of each director of the Company to the fullest extent
permitted by law.

         The Company has obtained directors' and officers' liability insurance,
under which directors and officers of the Company may be insured or indemnified 
against certain liabilities which they may incur in their capacity as such.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

         Not applicable.

ITEM 8.  EXHIBITS.

         The following exhibits are filed as a part of this Registration
Statement:


<TABLE>
<CAPTION>

         NUMBER            DESCRIPTION
         ------            ----------- 
         <S>               <C>
         4.1               Amended and Restated Articles of Incorporation of C3, Inc. (incorporated by reference to
                           Exhibit 3.1 of the Company's Registration Statement on Form S-1 (File No. 333-36809)).

         4.2               Amended and Restated Bylaws of C3, Inc. (incorporated by reference to Exhibit 3.2 of the
                           Company's Registration Statement on Form S-1 (File No. 333-36809)).

         5                 Opinion of Womble Carlyle Sandridge & Rice, PLLC, as to the legality of the Common
                           Stock being registered.

         23.1              Consent of Womble Carlyle Sandridge & Rice, PLLC (included in Exhibit 5).

         23.2              Consent of Deloitte & Touche, LLP.

         24                Power of Attorney (included in the signature page to this Registration Statement).

         99.1              1996 Stock Option Plan of C3, Inc., as amended  (incorporated by reference to Exhibit 10.15
                           of the Company's Registration Statement on Form S-1 (File No. 333-36809)).

         99.2              1997 Omnibus Stock Plan of C3, Inc. (incorporated by reference to Exhibit 10.16 of the
                           Company's Registration Statement on Form S-1 (File No. 333-36809)).

         99.3              1997 Declaration of Amendment to 1997 Omnibus Stock Plan of C3, Inc.

         99.4              Stock Option Agreement, dated May 25, 1996, between C3, Inc. and Robert C. Glass and
                           Bronwen K. Nishikawa.

         99.5              Stock Option Agreement, dated June 4, 1996, between C3, Inc. and Earl R. Hines and
                           Jacqueline C. Hines.

         99.6              Stock Option Agreement, dated June 6, 1996, between C3, Inc. and Douglas G. Waltz.

</TABLE>





<PAGE>   4



ITEM 9.  UNDERTAKINGS.

(a)      The Company hereby undertakes:

         (1)      To file, during any period in which offers or sales are being
                  made, a post-effective amendment to this Registration
                  Statement:

                  (i)      To include any prospectus required by Section
                           10(a)(3) of the Securities Act;

                  (ii)     To reflect in the prospectus any facts or events
                           arising after the effective date of the Registration
                           Statement (or the most recent post-effective
                           amendment thereof) which, individually or in the
                           aggregate, represent a fundamental change in the
                           information set forth in the Registration Statement;

                  (iii)    To include any material information with respect to
                           the plan of distribution not previously disclosed in
                           the Registration Statement or any material change to
                           such information in the Registration Statement;

         PROVIDED, HOWEVER, that paragraphs (a)(1)(i) and (a)(1)(ii) do not
         apply if the information required to be included in a post-effective
         amendment by those paragraphs is contained in periodic reports filed
         with or furnished to the Commission by the Company pursuant to Section
         13 or Section 15(d) of the Exchange Act that are incorporated by
         reference in the Registration Statement.

         (2)      That, for the purpose of determining any liability under the
                  Securities Act, each such post-effective amendment shall be
                  deemed to be a new registration statement relating to the
                  securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

         (3)      To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

(b)      The Company hereby undertakes that, for purposes of determining any
         liability under the Securities Act, each filing of the Company's annual
         report pursuant to Section 13(a) or Section 15(d) of the Exchange Act
         that is incorporated by reference in the Registration Statement shall
         be deemed to be a new registration statement relating to the securities
         offered therein, and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.

(c)      Insofar as indemnification for liabilities arising under the
         Securities Act may be permitted to directors, officers and controlling
         persons of the Company pursuant to the foregoing provisions, or
         otherwise, the Company has been advised that in the opinion of the
         Commission such indemnification is against public policy as expressed
         in the Securities Act and is, therefore, unenforceable. In the event
         that a claim for indemnification against such liabilities (other than
         the payment by the Company of expenses incurred or paid by a director,
         officer or controlling person of the Company in the successful defense
         of any action, suit or proceeding) is asserted by such director,
         officer or controlling person in connection with the securities being
         registered, the Company will, unless in the opinion of its counsel the
         matter has been settled by controlling precedent, submit to a court of
         appropriate jurisdiction the question whether such indemnification by
         it is against public policy as expressed in the Securities Act and
         will be governed by the final adjudication of such issue.





<PAGE>   5

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, C3, Inc.
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the Town of Morrisville, State of North Carolina, on this 31st
day of December, 1997.

                                            C3, INC.


                                            By:      /s/  JEFF N. HUNTER
                                               ---------------------------------
                                                     Jeff N. Hunter
                                                     President and Chairman

                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS that each person whose signature appears
on the signature pages to this Registration Statement hereby constitutes and
appoints Jeff N. Hunter and Mark W. Hahn, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution and
resubstitution, for the undersigned, and in his name, place and stead, in any
and all capacities to sign any and all amendments, including post-effective
amendments, exhibits thereto and other documents in connection therewith, to
this Registration Statement, to make such changes in the Registration Statement
as such attorneys-in-fact deems appropriate, and to file the same, with all
exhibits thereto and other documents in connection therewith with the Securities
and Exchange Commission, granting unto said attorneys-in-fact and agents and
each of them, full power and authority to do so and perform each and every act
and thing requisite and necessary to be done, as fully to all intents and
purposes as the undersigned might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents, or either of them, or
their or his substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on December 31, 1997.


        /s/ JEFF N. HUNTER                           /s/ FREDERICK A. RUSS
- -------------------------------------          ---------------------------------
            Jeff N. Hunter                               Frederick A. Russ
       PRESIDENT AND DIRECTOR                                DIRECTOR
    (PRINCIPAL EXECUTIVE OFFICER)


         /s/ KURT LEUTZINGER                          /s/ DAVID B. STEWART
- -------------------------------------          ---------------------------------
             Kurt Leutzinger                              David B. Stewart
                DIRECTOR                                      DIRECTOR


          /s/ KURT NASSAU                              /s/ OLLIN B. SYKES
- -------------------------------------          ---------------------------------
              Kurt Nassau                                  Ollin B. Sykes
                DIRECTOR                                      DIRECTOR


          /s/ HOWARD RUBIN                             /s/ MARK W. HAHN
- -------------------------------------          ---------------------------------
              Howard Rubin                                 Mark W. Hahn
                DIRECTOR                             CHIEF FINANCIAL OFFICER
                                                     (PRINCIPAL FINANCIAL AND 
                                                        ACCOUNTING OFFICER)




<PAGE>   6



                                  EXHIBIT INDEX
                                       TO
                      REGISTRATION STATEMENT ON FORM S-8 OF
                                    C3, INC.

<TABLE>
<CAPTION>


         NUMBER            DESCRIPTION
         ------            -----------
         <S>               <C>
         4.1               Amended and Restated Articles of Incorporation of C3, Inc. (incorporated by reference to
                           Exhibit 3.1 of the Company's Registration Statement on Form S-1 (File No. 333-36809)).

         4.2               Amended and Restated Bylaws of C3, Inc. (incorporated by reference to Exhibit 3.2 of the
                           Company's Registration Statement on Form S-1 (File No. 333-36809)).

         5                 Opinion of Womble Carlyle Sandridge & Rice, PLLC, as to the legality of the Common
                           Stock being registered.

         23.1              Consent of Womble Carlyle Sandridge & Rice, PLLC (included in Exhibit 5).

         23.2              Consent of Deloitte & Touche LLP.

         24                Power of Attorney (included in the signature page to this Registration Statement).

         99.1              1996 Stock Option Plan of C3, Inc., as amended  (incorporated by reference to Exhibit 10.15
                           of the Company's Registration Statement on Form S-1 (File No. 333-36809)).

         99.2              1997 Omnibus Stock Plan of C3, Inc. (incorporated by reference to Exhibit 10.16 of the
                           Company's Registration Statement on Form S-1 (File No. 333-36809)).

         99.3              1997 Declaration of Amendment to 1997 Omnibus Stock Plan of C3, Inc.

         99.4              Stock Option Agreement, dated May 25, 1996, between C3, Inc. and Robert C. Glass and
                           Bronwen K. Nishikawa.

         99.5              Stock Option Agreement, dated June 4, 1996, between C3, Inc. and Earl R. Hines and
                           Jacqueline C. Hines.

         99.6              Stock Option Agreement, dated June 6, 1996, between C3, Inc. and Douglas G. Waltz.

</TABLE>










<PAGE>   1

                                                                      EXHIBIT 5

                                December 31, 1997

C3, Inc.
3800 Gateway Boulevard, Suite 310
Morrisville, North Carolina  27560

         Re:      1996 Stock Option Plan of C3, Inc. and
                  1997 Omnibus Stock Plan of C3, Inc.

Ladies and Gentlemen:

         We have served as counsel for C3, Inc. (the "Company") in connection
with its registration under the Securities Act of 1933, as amended, of 1,377,045
shares of its common stock, no par value (the "Shares"), which are proposed to
be offered and sold pursuant to the (1) 1996 Stock Option Plan of C3, Inc., as
amended; (2) 1997 Omnibus Stock Option Plan of C3, Inc., as amended
(individually, a "Plan" and collectively, the "Plans"); and (3) certain options
issued to consultants performing services on behalf of the Company prior to
adoption of the Plans pursuant to certain option agreements (the "Agreements"),
and pursuant to the Company's Registration Statement on Form S-8 (the
"Registration Statement") to be filed with the Securities and Exchange
Commission (the "Commission") with respect to the Shares.

         In rendering this opinion, we have relied upon, among other things, our
examination of such records of the Company and certificates of its officers and
of public officials as we have deemed necessary. We express no opinion as to
matters under or involving
 the laws of any jurisdiction other than the corporate
law of the State of North Carolina.

         Based upon the foregoing, and having regard for such legal
considerations as we have deemed relevant, we are of the opinion that the Shares
have been duly authorized and, when issued and paid for in accordance with the
terms of the respective Plan or Agreement, will be validly issued, fully paid
and nonassessable.

         We hereby consent to the filing of this opinion with the Commission as
an exhibit to the Registration Statement.


                                       WOMBLE CARLYLE SANDRIDGE & RICE
                                       A PROFESSIONAL LIMITED LIABILITY COMPANY


                                       By:     /s/ CYRUS M. JOHNSON, JR.
                                       -----------------------------------------
                                       Name:       CYRUS M. JOHNSON, JR.
                                       -----------------------------------------






<PAGE>   1



                                                                    EXHIBIT 23.2



INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in this Registration Statement of
C3, Inc. on Form S-8 of our report dated March 11, 1997, except for Note 9, as
to which the date is September 25, 1997, appearing in the Registration Statement
of C3, Inc. on Form S-1 No. 333-36809 and the related Prospectus.



/s/ Deloitte & Touche, LLP


Raleigh, North Carolina
December 31, 1997








<PAGE>   1



                                                                    EXHIBIT 99.3

                                    C3, INC.
                                    --------
                        1997 DECLARATION OF AMENDMENT TO
                           1997 OMNIBUS STOCK PLAN OF
                                    C3, INC.

     THIS DECLARATION OF AMENDMENT, made this 11th day of December, 1997, by
C3, INC., a North Carolina corporation (the "Corporation"), to the 1997 Omnibus
Stock Plan of C3, Inc. (the "Plan").

                                R E C I T A L S:

         WHEREAS, the Corporation has established the Plan, which Plan has been
approved by the Board of Directors (the "Board" or the "Board of Directors") and
the shareholders of the Corporation; and

         WHEREAS, the Plan is intended to encourage selected employees,
directors and independent contractors to increase their proprietary interest in
the Corporation, in order to stimulate their efforts to enhance the efficiency,
soundness, profitability, growth and shareholder value of the Corporation; and

         WHEREAS, the Board has determined that certain amendments should be
made to the Plan in order to accomplish such purposes and to clarify the
interpretation of certain Plan provisions;

         NOW, THEREFORE, IT IS DECLARED, that, effective as of the date hereof,
the Plan shall be amended as follows:

         1. The first sentence of Section 5(b) is hereby deleted and the
following sentence is inserted in lieu thereof, with the remaining portion of
Section 5(b) being unchanged:


                  "(b) With respect to the grant of an Incentive Option, the
         individual does not own, immediately before the time that the Incentive
         Option is granted, stock possessing more than ten percent of the total
         combined voting power of all classes of stock of the Corporation or a
         related corporation; provided, however, that an individual owning more
         than ten percent of the total combined voting power of all classes of
         stock of the Corporation or a related corporation may be granted an
         Incentive Option if the price at which such Option may be exercised is
         greater than or equal to 110 percent (110%) of the fair market value of
         the shares on the date the Option is granted and the period of the
         Option does not exceed five years."

         2. All references in Section 6(c)(iii)(E) to the "Company" shall be
deleted and the term "Corporation" shall be inserted in lieu thereof.

         3. The first sentence of Section 6(c)(iv) shall be deleted and the
following sentence shall be inserted in lieu thereof, with the remaining portion
of Section 6(c)(iv) being unchanged:

                  "(iv) Unless an individual option agreement provides
         otherwise, an Option granted to a Participant who was an independent
         contractor or director of the Corporation or a related corporation at
         the time of grant (and who does not thereafter become an employee, in
         which case he shall be subject to the provisions of Section 6(c)(iii)
         herein) may be exercised only to the extent exercisable on the date of
         the Participant's termination of service to the Corporation or a
         related corporation (unless the termination was for cause), and must be
         exercised, if at all, prior to the first to occur of the following, as
         applicable: (X) the close of the period of 90 days next succeeding the
         termination date; or (Y) the close of the Option Period."

         4. Section 7(d)(iii) shall be deleted in its entirety and the following
shall be inserted in lieu thereof:




<PAGE>   2



                  "(iii) No SAR may be exercised unless the Participant is, at
         the time of exercise, an eligible Participant, as described in Section
         5, and has been a Participant continuously since the date the SAR was
         granted, subject to the provisions of Section 6(c)(iii) and (iv)
         herein."

         5. The first sentence of Section 8(a) of the Plan shall be deleted in
its entirety and the following shall be inserted in lieu thereof, with the
remainder of Section 8(a) being unchanged:

                  "(a) GRANT OF RESTRICTED AWARDS: Subject to the limitations of
          the Plan, the Committee may in its sole and absolute discretion grant
          Restricted Awards to such eligible individuals in such numbers, upon
          such terms and at such times as the Committee shall determine."

         IN WITNESS WHEREOF, this Declaration of Amendment is executed on behalf
of C3, Inc. as of the day and year first above written.


                                              C3, INC.



                                               By:
                                                  ------------------------------
                                                      Jeff N. Hunter
                                                      President

ATTEST:


- ----------------------------------
Mark W. Hahn
Secretary

[Corporate Seal]






<PAGE>   1



                                                                    EXHIBIT 99.4

                             STOCK OPTION AGREEMENT

         THIS AGREEMENT, made the 25th day of May, 1996, between C3, Inc., a
North Carolina corporation (the "Company"), and Robert C. Glass and Bronwen K.
Nishikawa, jointly with right of survivorship (the "Optionee").

                                R E C I T A L S:

         In consideration of One Dollar ($1.00) and other good and valuable
consideration paid to the Company by the Optionee, the receipt of which is
acknowledged by the Company, the Company and the Optionee hereby agree as
follows:

         1. The Company hereby grants to the Optionee the right and option to
purchase all or any part of an aggregate of Five Thousand (5,000) shares of the
common stock of the Company (the "Shares") at the purchase price of Four Dollars
($4.00) per share (the "Option"). The parties acknowledge that the fair market
value of the Shares on the date of this agreement is equal to Four Dollars per
share.

         2. The period during which the Option may be exercised (the "Option
Period") is five (5) years from the date hereof.

         3. The Optionee may exercise the Option by giving written notice to the
Company at the Company's principal office. That notice shall specify the number
of Shares to be purchased and the purchase price to be paid therefor, and shall
be accompanied by the payment of the purchase
 price in cash or by certified
check. The notice shall be deemed to have been given either when delivered
personally or when mailed, postage prepaid, to the Secretary of the Company at
the principal office of the Company. The Company shall issue a certificate or
certificates for the Shares purchased pursuant to the exercise of the Option as
soon thereafter as practicable.

         4. The Option shall not be transferable by the Optionee and may be
exercised only by the Optionee during his lifetime.

         5. This Agreement shall be binding upon and shall inure to the benefit
of the parties hereto and their respective executors, administrators,
next-of-kin, successors or assigns. This paragraph shall not be construed to
authorize any transfer in violation of paragraph 4.

         6. Any controversy or claim arising out of or relating to the Agreement
shall be settled by arbitration in Charlotte, North Carolina, in accordance with
the rules of the American Arbitration Association.

         7. The Option is granted on the condition that all Shares purchased
hereunder shall be acquired for investment purposes only and not for the purpose
of resale or distribution. If deemed necessary or appropriate in the opinion of
legal counsel for the Company, certificates issued evidencing Shares acquired
pursuant to the exercise of the Option shall bear a restrictive legend setting
forth the provisions of this Section 7 in substantially the following form:

                  "The shares represented by this certificate have not been
         registered with the Securities and Exchange Commission or with any
         state agency and may not be transferred in the absence of an effective
         registration with respect thereto or an opinion of counsel satisfactory
         to the Company that such registration is not required."

         8. If there is any change in the Shares subject to the Option through
merger, consolidation or reorganization, or if the Company declares a stock
split or a stock dividend to holders of Shares that is distributable in stock of
the same class, or if there is an issuance to such holders of rights to
subscribe to stock of the same class, or if there is a change in the capital
structure of the Company, the Company shall make such adjustments with respect
to the Option or any provisions of this Agreement as it deems equitable to
prevent dilution or enlargement of the rights of the Optionee.

         9. The Agreement may be modified or amended by written agreement of the
parties hereto.




<PAGE>   2



         10. Except as otherwise provided herein, this Agreement shall be
construed and enforced according to the laws of the State of North Carolina.

         IN WITNESS WHEREOF, this Agreement has been executed in behalf of the
Company and by the Optionee on the day and year first above written.


                                          C3, INC.


                                          By: 
                                             ----------------------------------
                                                       President


Attest:

- ---------------------------
       Secretary


[Corporate Seal]

                                          OPTIONEE

                                                                          (SEAL)
                                          -------------------------------


                                          -------------------------------------



<PAGE>   1



                                                                    EXHIBIT 99.5


                             STOCK OPTION AGREEMENT

         THIS AGREEMENT, made the 4th day of June, 1996, between C3, Inc., a
North Carolina corporation (the "Company"), and Earl R. Hines and Jacqueline C.
Hines, jointly with right of survivorship (the "Optionee").

                                R E C I T A L S:

         In consideration of One Dollar ($1.00) and other good and valuable
consideration paid to the Company by the Optionee, the receipt of which is
acknowledged by the Company, the Company and the Optionee hereby agree as
follows:

         1. The Company hereby grants to the Optionee the right and option to
purchase all or any part of an aggregate of Two Thousand and Five Hundred
(2,500) shares of the common stock of the Company (the "Shares") at the purchase
price of Four Dollars ($4.00) per share (the "Option"). The parties acknowledge
that the fair market value of the Shares on the date of this agreement is equal
to Four Dollars per share.

         2. The period during which the Option may be exercised (the "Option
Period") is five (5) years from the date hereof.

         3. The Optionee may exercise the Option by giving written notice to the
Company at the Company's principal office. That notice shall specify the number
of Shares to be purchased and the purchase price to be paid therefor, and shall
be accompanied by the payment
 of the purchase price in cash or by certified
check. The notice shall be deemed to have been given either when delivered
personally or when mailed, postage prepaid, to the Secretary of the Company at
the principal office of the Company. The Company shall issue a certificate or
certificates for the Shares purchased pursuant to the exercise of the Option as
soon thereafter as practicable.

         4. The Option shall not be transferable by the Optionee and may be
exercised only by the Optionee during his lifetime.

         5. This Agreement shall be binding upon and shall inure to the benefit
of the parties hereto and their respective executors, administrators,
next-of-kin, successors or assigns.

         6. Any controversy or claim arising out of or relating to the Agreement
shall be settled by arbitration in Charlotte, North Carolina, in accordance with
the rules of the American Arbitration Association.

         7. The Option is granted on the condition that all Shares purchased
hereunder shall be acquired for investment purposes only and not for the purpose
of resale or distribution. If deemed necessary or appropriate in the opinion of
legal counsel for the Company, certificates issued evidencing Shares acquired
pursuant to the exercise of the Option shall bear a restrictive legend setting
forth the provisions of this Section 7 in substantially the following form:

                  "The shares represented by this certificate have not been
         registered with the Securities and Exchange Commission or with any
         state agency and may not be transferred in the absence of an effective
         registration with respect thereto or an opinion of counsel satisfactory
         to the Company that such registration is not required."

         8. If there is any change in the Shares subject to the Option through
merger, consolidation or reorganization, or if the Company declares a stock
split or a stock dividend to holders of Shares that is distributable in stock of
the same class, or if there is an issuance to such holders of rights to
subscribe to stock of the same class, or if there is a change in the capital
structure of the Company, the Company shall make such adjustments with respect
to the Option or any provisions of this Agreement as it deems equitable to
prevent dilution or enlargement of the rights of the Optionee.

         9. The Agreement may be modified or amended by written agreement of the
parties hereto.




<PAGE>   2



         10. Except as otherwise provided herein, this Agreement shall be
construed and enforced according to the laws of the State of North Carolina.

         IN WITNESS WHEREOF, this Agreement has been executed in behalf of the
Company and by the Optionee on the day and year first above written.


                                          C3, INC.


                                          By: 
                                             ----------------------------------
                                                       President


Attest:

- ---------------------------
       Secretary


[Corporate Seal]

                                          OPTIONEE

                                                                          (SEAL)
                                          -------------------------------






<PAGE>   1



                                                                   EXHIBIT 99.6


                             STOCK OPTION AGREEMENT

         THIS AGREEMENT, made the 6th day of June, 1996, between C3, Inc., a
North Carolina corporation (the "Company"), and Douglas G. Waltz, (the
"Optionee").

                                R E C I T A L S:

         In consideration of One Dollar ($1.00) and other good and valuable
consideration paid to the Company by the Optionee, the receipt of which is
acknowledged by the Company, the Company and the Optionee hereby agree as
follows:

         1. The Company hereby grants to the Optionee the right and option to
purchase all or any part of an aggregate of Ten Thousand (10,000) shares of the
common stock of the Company (the "Shares") at the purchase price of Four Dollars
($4.00) per share (the "Option"). The parties acknowledge that the fair market
value of the Shares on the date of this agreement is equal to Four Dollars per
share.

         2. The period during which the Option may be exercised (the "Option
Period") is five (5) years from the date hereof.

         3. The Optionee may exercise the Option by giving written notice to the
Company at the Company's principal office. That notice shall specify the number
of Shares to be purchased and the purchase price to be paid therefor, and shall
be accompanied by the payment of the purchase price in cash or by certified
check. The notice shall be deemed
 to have been given either when delivered
personally or when mailed, postage prepaid, to the Secretary of the Company at
the principal office of the Company. The Company shall issue a certificate or
certificates for the Shares purchased pursuant to the exercise of the Option as
soon thereafter as practicable.

         4. The Option shall not be transferable by the Optionee and may be
exercised only by the Optionee during his lifetime.

         5. This Agreement shall be binding upon and shall inure to the benefit
of the parties hereto and their respective executors, administrators,
next-of-kin, successors or assigns.

         6. Any controversy of claim arising out of or relating to the Agreement
shall be settled by arbitration in Charlotte, North Carolina, in accordance with
the rules of the American Arbitration Association.

         7. The Option is granted on the condition that all Shares purchased
hereunder shall be acquired for investment purposes only and not for the purpose
of resale or distribution. If deemed necessary or appropriate in the opinion of
legal counsel for the Company, certificates issued evidencing Shares acquired
pursuant to the exercise of the Option shall bear a restrictive legend setting
forth the provisions of this Section 7 in substantially the following form:

                  "The shares represented by this certificate have not been
         registered with the Securities and Exchange Commission or with any
         state agency and may not be transferred in the absence of an effective
         registration with respect thereto or an opinion of counsel satisfactory
         to the Company that such registration is not required."

         8. If there is any change in the Shares subject to the Option through
merger, consolidation or reorganization, or if the Company declares a stock
split or a stock dividend to holders of Shares that is distributable on stock of
the same class, or if there is an issuance to such holders of rights to
subscribe to stock of the same class, or if there is a change in the capital
structure of the Company, the Company shall make such adjustments with respect
to the Option or any provisions of this Agreement as it deems equitable to
prevent dilution or enlargement of the rights of the Optionee.

         9. The Agreement may be modified or amended by written agreement of the
parties hereto.




<PAGE>   2


         10. Except as otherwise provided herein, this Agreement shall be
construed and enforced according to the laws of the State of North Carolina.

         IN WITNESS WHEREOF, this Agreement has been executed in behalf of the
Company and by the Optionee on the day and year first above written.


                                          C3, INC.


                                          By: 
                                             ----------------------------------
                                                       President


Attest:

- ---------------------------
       Secretary


[Corporate Seal]

                                          OPTIONEE

                                                                          (SEAL)
                                          -------------------------------