Which maintenance mode option will allow an administrator to successfully perform the required upgrades, while ensuring all VMs remain online?

A company has reserved the last Saturday of the month to conduct server maintenance. An administrator is allowed to perform maintenance from 5 AM to 12 PM. During the upcoming maintenance window, the administrator will upgrade the controller driver, controller firmware, and vSphere version.

Environment details:

• vCenter is already at the latest version

• 5 node vSAN cluster

• The VMs are using a mix of RAID-0, RAID-1, and RAID-5 policies

• Each node is storing 20 TBs worth of VMs

Which maintenance mode option will allow an administrator to successfully perform the required upgrades, while ensuring all VMs remain online?
A . Full data migration
B . No Data Migration
C . Ensure Accessibility
D . Admission Control Enabled