Which two steps must the administrator take in order to accomplish this?

An administrator needs to perform maintenance on an ESXi host that is part of a vCloud
Provider vDC. The maintenance will include a host reboot. The management team requires
that service remain uninterrupted for all virtual machines in the vCloud environment. Which
two steps must the administrator take in order to accomplish this? (Choose two.)

A.
Migrate VMs to another ESXi host.

B.
Place the ESXi host in Maintenance Mode.