This graph represents responses to the poll question: How helpful were candidates' commercials to you in deciding which candidate to vote for?

Based on the graph, what conclusion can be drawn about the use of campaign commercials during an election?

A) Candidates run too many negative commercials.

B) Few voters actually see campaign commercials.

C) Commercials usually do not help voters decide how to vote.

D) Most voters are influenced by the arguments presented in commercials.