Salespeople always steer customers toward products from which they make ... ...

Salespeople always steer customers toward products from which they make their highest commissions, and all salespeople in major health stores work on commission. Hence, when you buy vitamin supplements in a major health store, you can be sure that the claims the salespeople make about the quality of the products are inaccurate. The reasoning in the argument is flawed in that the argument
(A) offers as a premise a claim that merely paraphrases the conclusion and for which no support is provided
(B) ...
(C) ...
(D) ...
(E) ...

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