In any given primary or caucus, the candidates must

The candidate win the majority of votes.

Explanation:

Primary is a means where voters head to the polls to choose the preferred nominee to represent them in any form of election while caucus are majorly use in fewer areas to select candidates by voters for an election.

answer; /// i believe that the correct answer is (a) making presentations;

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer