Which of the Following Is a Limitation of the Convention

Which of the following is a limitation of the convention system that was used to nominate political party candidates?

A) Convention meetings were unofficial meetings.
B) Very few leaders were nominated through the convention system than through the caucus system of nominating.
C) Only one candidate could be nominated in the convention system.
D) The direct participation of ordinary voters in selecting delegates resulted in mob rule.
E) Convention delegates were rarely chosen by a vote of the party's local members.