授信从业人员“四个必须”执业基本规范：（）

A.必须现场调查客户；

B.必须按期年审授信。

C.必须实地核押核保；

D.必须如实预警风险。

It is not as difficult to store information as it is to ______ it quickly when it is wanted again.

A．represent

B．retain

C．restore

D．retrieve