One of my close friends made great progress in her studies so her teachers ____ her, and I _____ her. [ ]

A. were happy with; was happy with

B. were happy for; was happy for

C. were happy with; was happy for

D. were happy for; was happy with

用户分散而制造企业相对集中，自主创新以（）为主，消费品特别是耐用消费品制造大都是这种情况。

A.生产者

B.制造企业

C.用户

D.消费者