Which definition best describes the staff training service component within the wireless implement phase? Select exactly 1 answer(s) from the following:

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

B.
Provides a step-by-step plan detailing the installation and service-commission requirement tasks to be staged in a controlled implementation environment that emulates a customer network.

C.
develops a training plan and delivers via a custom workshop or e-learning

D.
reduces the risk of downtime caused by facilities-related problems