The correct answer is D.
Elections are often decided by only a few votes.
Voting in an election is a right and a moral obligation for many. However, nobody can force a citizen to vote. Voting is a direct way to tell the government what the citizens want.
Only a few or even one vote can make a difference in the outcome of an election. Richard Nixon, for example, and not John F. Kennedy would have become President in 1960 if one person from each voting place had voted differently. The argument that 'it's only one vote after all' is dangerous because whoever says it forgets that it's not only them who think so. So the ' it's only one vote after all' attitude multiplies itself by people with similar way of thinking. In the end, the 'one vote' becomes many votes which may significantly change the results of an election.