The Main Problem with Voting as a Form of Political

The main problem with voting as a form of political participation is that

A) citizens cannot communicate very much information by only casting a ballot.
B) the electoral system is rigged to favor the status quo.
C) voting is a form of political participation that requires the most time and commitment.
D) voting has very little impact on what government does.
E) there are many legal obstacles that prevent most citizens from voting.