____ in the area reported _____ three people robbing the bank with their heads wrapped in stocks.

A．Witness; to look at

B．Witnesses; seeing

C．Witnesses; looking out

D．Witness; to see

下面哪几类投诉属于无效投诉。（）

A.客户投诉内容或客户要求与国家法律、法规、政策及合同等相违背

B.第三方厂家的产品或服务导致的客户投诉，但不包括对中兴通讯配合服务不满的投诉

C.投诉人为中兴通讯间接客户

D.非公司提供的服务或产品问题