A Primary Is

A primary is

A) a method for political parties to select their candidates for office whereby party members convene at local meetings.
B) a method for political parties to select their candidates for office whereby people vote in an election.
C) an entity that selects the president and vice president, consisting of 538 electors chosen from the states and the District of Columbia based on the election outcome within each state and proportioned according to state population.
D) None of the above