A salesperson who makes a sale does not change the desires of the customer. ... ...

A salesperson who makes a sale does not change the desires of the customer. Rather, the salesperson finds out what these desires are and then convinces the customer that a particular product will satisfy them. Persuading people to vote for a politician to whom they are initially indifferent is not significantly different. After discovering what policies the prospective voter would like to see in place, one tries to _______. Which one of the following most logically completes the argument?
(A) show that the opponents of the politician in question do not favor all of those policies
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2012 LSAT (PT67): Logical Reasoning B