Answer:
B Limited to registered members of a political party Party members choose nominees after hours of speeches and debates
Explanation:
Closed primary is the process whereby only registered voters of a party are allowed to vote in the selection process of the party nominee for elections. On the other hand a party caucus are closed door meetings of party members, where they discuss and at the end select a party nominee.
The aim of both closed primaries and caucuses is to enable political parties choose their flag bearers at the polls