What is the best practice for repairing the hardware?

You work as a administrator at Domain.com. One of the hosts in a cluster of 10 hosts requires maintenance. This host is currently two virtual machines (VMs) for a total of 30% CPU utilization.
What is the best practice for repairing the hardware?

A.
place the host in Maintenance mode

B.
place the host in Offlien mode

C.
place the VMs on the host in Maintenance mode

D.
repair the server while running VMs