Which service components develops a plan that identifies the necessary steps to move from an existing system to the Cisco Unified Communications system（）

A.It helps to confirm project roles and responsibilites， and milestones dates.
B.It reduces the risk of downtime caused by facilities-related problems.
C.It ensures that the customer receives a detailed network diagram.
D.It ensures end-user support immediately after the launch of the new system.

A.Operate
B.Plan
C.Deploy
D.Implement

A.Design
B.Implement
C.Plan
D.Prepare