You issue the following RMAN command to set a retention policy on a database: RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2; What will be the outcome of issuing this command? （）

A. fter two days, a backup will be marked obsolete

B. fter two days, a backup will be deleted from the media

C. If the RMAN repository has records of two or more recent backups of a file, then older backups will be deleted from the media.

D. If the RMAN repository has records of two or more recent backups of a file, then older backups will be marked obsolete.