Which Statement About the Effects of Campaign Advertising on Voter

Which statement about the effects of campaign advertising on voter preferences is most accurate?

A) Political advertising has an enormous effect on a voter's perceptions of a candidate.
B) Voters are quick to forget new information conveyed by political advertising.
C) Any new information that counters a voter's existing perception of a candidate is automatically ignored.
D) Voters have relied less and less on advertising as a source of political information.