PT 58 S1 Q9

People who need to reduce their intake of fat and toconsume fewer calories ... ...

The reasoning in the argument is most vulnerable to criticism on the grounds that the argument fails to consider the possibility that
(A) many foods cannot be prepared with N5
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-A, Sept. '09 LSAT (PT 58 Sec. 1)