What about Virtual to virtual (V2V)?

A)  The migration of an operating system (OS), data and applications from one virtual machine (VM) or disk partition to another.
B)  The migration of a VM from one physical host to another while continuously powered on
C)  The migration of an OS, data and applications from the computer's main hard disk to a VM or disk partition
D)  The migration to backup operational mode in which secondary system components assume the system's functions when the primary components become unavailable

Correct Answer :   The migration of an operating system (OS), data and applications from one virtual machine (VM) or disk partition to another.