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