Which two statements regarding compressed backups in Recovery Manager （RMAN） are true？（）

• A、 Backup compression is disabled by default.
• B、 Backup compression can be used with both backup sets and image copies.
• C、 Backup compression cannot be enabled using the CONFIGURE command.
• D、 Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.
• E、 Backup compression applies to only backup sets.
• F、 Backup compression applies to only image copies.