PT 60 S1 Q15

   Camille: Manufacturers of water-saving faucetsexaggerate ... ...

The reasoning in Rebecca's argument is questionable in that she takes for granted that
(A) the cost of installing her water-saving faucet was less than her overall savings on her water bill
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-A, June '10 LSAT (PT 60 Sec. 1)