Why is file recovery used? Select THREE.

A.
The system has lost half of a mirrored data volume.

B.
An application has incorrectly updated an audited file.

C.
An audited file has been accidentally purged.

D.
A volume recovery requested by an operator has not been completed properly.

E.
The ZTMFCONF subvolume has become corrupted.

F.
A system failure has occurred from which volume recovery cannot recover.