You cannot register to vote over the phone. Option D is correct.
Voter registration varies according to the state.
Voter registration in the United States is the voter registration that is required for voting in federal, state and local elections in the United States. Registering to vote requires that you provide your correct name, current address and other information to the government office that runs elections where you live.
In most states, persons registering to vote may at the same time declare an affiliation with a political party.