In such a fierce competition, a person has to make every effort if he ______ .

A．has succeeded

B．is to succeed

C．would succeed

D．will succeed

下面的( )不属于证券经纪业务的禁止行为。

A．挪用客户交易结算资金
B．根据委托单内容(可能并非当时最有利的委托价格)向交易所申报
C．在批准的营业场所之外接受客户委托
D．降低证券交易收费标准