A server technician is about to perform a major upgrade to the operating system of a critical system. This system is currently in a virtualization environment. Which
of the following actions would result in the LEAST amount of downtime if the upgrade were to fail?
A.
Enabling live migration in the VM settings on the virtual server.
B.
Clustering the storage for the server to add redundancy.
C.
Performing a full backup of the virtual machine.
D.
Taking an initial snapshot of the system.