下列关于Windows NT Server的描述，哪个是正确的

A．Windows NT Server的内部采用64位体系结构

B．Windows NT Server以“域”为单位集中管理网络资源

C．Windows NT Server只支持TCP/IP协议

D．Windows NT Server没有融人对Unix的支持

We have heard what he has said; we are waiting to see            he will do. [ ]

A．how

B．what

C．when

D．that