What CLI command restores entire volume from a snapshot copy:

A.
Volume snapshot restore

B.
Volume snapshot promote

C.
Volume snapmirror restore

D.
Volume snapmirror resync

Explanation:
The command is “volume snapshot restore”,
The command “volume snapshot promote” does not exist in Ontap 8.2
c1::*> vol snapshot ?
(volume snapshot)
autodelete> Manage snapshot autodelete settings
compute-reclaimable *Calculate the reclaimable space if specified snapshots are deleted
create Create a snapshot
delete Delete a snapshot
modify Modify snapshot attributes
partial-restore-file Restore part of a file from a snapshot
policy> Manage snapshot policies
rename Rename a snapshot
restore *Restore the volume to a snapshot.
restore-file Restore a file from a snapshot
show Display a list of Snapshot copies