下列属于电子银行业务操作风险的是（）。

A、内部程序不完善

B、操作人员差错或舞弊

C、数字签名被破译

D、外部欺诈

---- Would you please tell me _______?

----Yes. There’s a bank over there.

A．When can I exchange money

B．where can I exchange money

C．when I can exchange money

D．where I can exchange money