You have just taken control of a project in the middle of execution and need to learn who has approval authority for revisions in scope（）document provides this information.

A.Resource assignment matrix

B.Change control plan

C.Project charter

D.Client organization chart

卫生器具排水管与排水横支管连接时，宜采用（）。

A．90°斜三通

B．45°三通

C．45°四通

D．90°斜四通