Which definition best describes the staging plan development service component within the

design phase?

A.
providing a step-by-step plan that details the installation and service-commission tasks
required in order to create a controlled-implementation environment that emulates a
customer network

B.
assessing the ability of site facilities to accommodate proposed infrastructure changes

C.
developing and executing proof-of-concept tests, validating high-level infrastructure
design, and identifying any design enhancements

D.
improving the network management system and the performance and functionality of
infrastructure operations