【单选题】After running the CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS command, what has been accomplished?()
A.
Retain the data file backup for 7 days.
B.
Run the recover process every 7 days.
C.
Destroy the physical backup files every 7 days.
D.
Destroy the physical backup files older than 7 days.
E.
Retain one backup of each data file for at least 7 days.
F.
Keep the catalog information in the control file for 7 days.