Today, National Party Conventions Have Become All but Which of the Following

Today, national party conventions have become all but which of the following ___ .

A) increasingly controlled and stylized events where the parties seek to present their best face to the voters
B) attempts to portray themselves, with the whole nation watching, as unified behind a leader and a program
C) the final stop on the road to ratify decisions made by the voters in their primaries and caucuses
D) the last chance for voters to hear from the candidates before the election