商业银行向客户直接提供资金支持，或者对客户在有关经济活动中可能产生的赔偿、支付责任作出保证是( )。

A．保证业务

B．授信业务

C．资产业务

D．负债业务

It is obvious that talking about something behind others is what everyone will not ______．

A．come up with

B．put up with

C．keep up with

D．catch up with