Which definition best describes the implementation service component within the implement
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.
installing, configuring, and integrating systems components based on an implementation
plan developed in earlier phases

E.
improving a customer??s infrastructure security system