How Can Campaign Advertisements Work Both for and Against a Candidate

Multiple Choice

How can campaign advertisements work both for and against a candidate?

A) Negative ads always make a candidate look good, while making his or her opponent look bad.
B) A contrast ad can neutralize a difficult topic, while risking more conversation on the topic than would ordinarily result.
C) Ads deliver the desired message, but some voters may want more in-depth coverage of a candidate's experience and positions.
D) Ads deliver the desired message, but news media are increasingly analyzing and reporting on their accuracy.