Examine the following RMAN command: Which two statements are true regarding the backup taken by using the above RMAN command?（）

• A、Only data files and the control file are backed up.
• B、Archived redo logs are backed up only I f the database is open during the backup.
• C、The backup is deleted after one day, regardless of the default retention policy settings.
• D、The backup becomes obsolete after one day, regardless of the default retention policy settings.