The correct answer is C) about two-thirds of voters.
At the start of most presidential campaigns, about two-thirds of voters have already decided on the candidate who will get their votes.
A considerable number of voters had already decided who they are going to vote at the beginning of presidential campaigns. These people have always voted for the same political party or other voters have sympathized with any particular candidate for its ideas or charisma. That is why is so important for the campaign team to address the proper messages to swing voters and undecided voters. They are the ones who can move the balance to one side. The other options of the question were A) all registered voters. B) about one-third of voters. D) swing voters.