量化管理、努力转化、防范为主、及时补偿是商业银行( )。

A．经营管理原则

B．贷款管理原则

C．风险管理原则

D．财务管理原则

Pipes made of plastic are now widely used in building as they are light and do not become （）in water.

A.ripe

B.instant

C.rotten

D.mature