Which of the following statements about the maintenance margin requirement is FALSE()

A. The purpose of the maintenance margin requirement is to protect the broker in the event of a large stock decline.

B. The Federal Reserve sets the maximum maintenance margin.

C. Generally the maintenance margin requirement is lower than the initial margin requirement.

管理机制包括约束机制、激励机制和（）。

A.监督机制

B.流动机制

C.分配机制

D.效率与公平机制

E.资本扩张机制