为自己加油

choose three. Identify three reasons for using a recovery catalog with

Recovery Manager (RMAN).

A.
to allow database duplication without a connection to the target instance.
B.
to store backup metadata that would cause the controlfile to become too large.
C.
to store backups that would cause the controlfile to become too large.
D.
to report on the database schema at an earlier point in time.
E.
to allow database duplication without a connection to the auxiliary instance.