Plumb-Ace advertises that its plumbers are more qualified than plumbers ... ...

Plumb-Ace advertises that its plumbers are more qualified than plumbers at any other major plumbing firm in the region because Plumb-Ace plumbers must complete a very difficult certification process. Plumb-Ace plumbers may or may not be more qualified, but clearly the certification process is not very difficult, because nearly everyone who takes the written portion of the certification exam passes it very easily. The reasoning in the argument is flawed in that it
(A) treats something that is necessary to make a certification process very difficult as if it were sufficient by itself to make the process very difficult
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2013 LSAT (PT69): Logical Reasoning B