It was Mr. Zhang that helped us out of the trouble. Without his help, we ______ it so easily.

A．can’t manage

B．mustn’t have managed

C．couldn’t have managed

D．couldn’t manage

下述关于货币乘数的说法中，正确的是（ ）。

A．现金漏损率越大，货币乘数越大

B．法定存款准备率越高，货币乘数越大

C．超额准备率越高，货币乘数越大

D．上述说法都不正确