Is there an error with the subject-verb agreement Ik this sentence. Dance classes at Springfield Community Center are free, but each of the students is required t participate in fundraising activities for at least two hours per semester

Delegates: representatives who cast votes at a political party's national convention. binding: if a primary or caucus is “binding” that means the delegates won in that contest are legally bound to vote for a particular candidate at the parties national convention.a primary is a preliminary election used to determine a party's nominee for a specific office. the winner of the party's caucus, or primary, wins the party nomination for that state. then the delegates meet at their party's national party convention, which is a formal gathering of all party delegates from all states.

  i think it is   b because it to subject