After upgrading the vSphere infrastructure and VMware Tools to version 6.5, the “Upgrade VM Compatibiity” option is grayed out in the vSphere Web Client. (See Exhibit.)
What must the administrator do to enable the VM compatibility upgrade?
A. Restart the ESXi server.
B. VMware Tools should be upgraded last.
C. Power off the virtual machine.
D. Uninstall the VMware Tools.
