You perform a backup using the following BACKUP command: RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE; Which statement is true of this command?（）

• A、A different procedure is required to restore a database from compressed backups
• B、The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
• C、Using this command to create backups minimizes the bandwidth consumed
• D、Using this command to create backups improves the performance of the backup process