The correct the answer is B) some voters go to polling places while some submit their ballots by mail.
The sentence that most accurately describes the elections in the US is "some voters go to polling places while some submit their ballots by mail."
Primary elections and caucuses are the first steps in the United States election process. Then, political parties organize conventions to decide who is going to be his/her candidate. This is a moment of union for the party, the candidate to the presidency and the vice president that is also elected in the formula. In a general election, US citizens go to their polling place to cast their vote. The Electoral College determines the winner of the election. So it is correct to say that the sentence that most accurately describes the elections in the US is "some voters go to polling places while some submit their ballots by mail."