203. You issue the following command: \nRMAN>CONFIGURE BACKUP OP

203. You issue the following command: \nRMAN>CONFIGURE BACKUP OPTIMIZATION ON; \nWhat is the result of this command on your backups?

A.An incremental backup strategy will be used automatically.

B.Read-only datafiles will not be backed up as long as backups of those files already exist and thosebackups meet established retention criteria.

C.RMAN will configure itself for maximum performance at the cost of CPU.

D.RMAN will configure itself for minimal OS/CPU impact at the cost of time to back up the database.

E.RMAN will automatically compress backups.

正确答案是B