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 t
题目
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.