Which of the following actions BEST achieves this task?

An administrator needs to implement a security patch policy on the network that adheres to an

internal SLA. Which of the following actions BEST achieves this task?

A.
Define a test server group, install the patches and if successful schedule installation on production servers.

B.
Define a test server group, schedule installation on production servers and then install all updates and patches.

C.
Install the patches during a non-working hour.

D.
Send an email to all company users and request the best time for installation.