Which statement is true?

You use RMAN to take regular backups for your database.
Examine the RMAN commands:
RMAN> CROSSCHECK BACKUP;
RMAN>DELETE EXPITED BACKUP;
Which statement is true?

A.
All backups and archived redo log files that are not required for the recovery are deleted and the repository
is updated.

B.
All metadata, for backups and archived redo log files that are recorded in the repository but do not exist on
disk or media, is deleted.

C.
All backups that have exceeded the age set by the RMAN retention policy are deleted.

D.
All metadata pertaining to backups and archived redo log files that have exceeded the age set by the RMAN
retention policy are deleted from the repository.

Explanation: