Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ___we should deal with properly.

A．as

B．that

C．which

D．where

利率商、风险大、容易发生违约纠纷、但却十分灵活，这是（）的特点。

A、国家信用

B、银行信用

C、消费信用

D、民间信用