（）is primarily concerned with defining and controlling what is and is not included in the project.

A.ProjectTime Management

B.Project Cost Management

C.Project Scope management

D.Project Communications Management

民用航空气象地面观测按观测内容分为（）、特殊观测和事故观测。

A.常规观测

B.日常观测

C.例行观测

D.普通观测