PT 59 S3 Q17

A recent study of major motion pictures revealed thatthe vast majority ... ...

Each of the following, if true, would contribute to an explanation of the apparent discrepancy in the information above EXCEPT:
(A) Movies based on standard plots are more likely to be financially successful than are ones based on original plots.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-B, Dec. '09 LSAT (PT 59 Sec. 3)