问题
Maintenance and on-going operations are crucially important to projects and should:
A:A be included as an activity to be performed during the project closure phase .
B:have a separate phase in the project life-cycle because a large portions of life-cycle costs are devoted to maintenance and operations .
C:not be view as part of a project-a project is temporary with a definite beginning and end .
D:be view as a separate project .
B:have a separate phase in the project life-cycle because a large portions of life-cycle costs are devoted to maintenance and operations .
C:not be view as part of a project-a project is temporary with a definite beginning and end .
D:be view as a separate project .
正确答案是：
