PT 65 S4 Q2

Syndicated political columnists often use their newspapercolumns to try ... ...

Which one of the following is an assumption required by the argument?
(A) Syndicated columnists influence the votes of most of their readers who have not yet decided which candidate to vote for.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2011 LSAT (PT 65): Logical Reasoning B