For a multi-product firm, if a project's beta is different from that of the overall firm, then the:
A. CAPM can no longer be used.
B. project should be discounted using the overall firm's beta.
C. project should be discounted at a rate commensurate with its own beta.
D. project should be discounted at the market rate.
E. project should be discounted at the T-bill rate.