It was ______it rained hard ______ the football match had to be put off till next week? 

A．because of, which

B．why, that

C．why, which

D．because, that

生产性采购，是那些既不构成企业最终产品的直接组成部分，也不是生产过程中所使用的产品或服务的采购，包括非生产性机器设备、MRO (维护修理)、耗材(如备件、工具和燃料)以及办公室用品。( )