Which Statement best describes the staging plan development service component within the design phase?

A.
It includes the development and execution of proof-of-concepts test, validates the infrastructure high-level design, and identifies any design enhancements.

B.
It assesses the ability of the site facilities to accommodate the proposed infrastructure.

C.
It provides a plan detailing the installation and service-commission requirement tasks to be staged in a controlled implementation environment that emulates a customer network

D.
It helps improve the performance and functionality of the infrastructure operations and network management system