First Principles Thinking: credit cannot be claimed beyond one's actual contribution
C is correct. Standard I(C) prohibits statements that mislead others about the source of performance or the member's role in producing it. Team results cannot be recast as one person's success without fair qualification.
A is tempting because prior-firm data can raise other issues, but the key misrepresentation here is false attribution, not merely the age of the record.
B fails because fee disclosure may matter in some contexts, but it is not the main defect described in the stem.