Which two statements about Recovery Manager (RMAN) backups are true? (Choose two.)
A.
Online redo log files can be backed up.
B.
RMAN backup can be taken only if the database is configured in ARCHIVELOG mode.
C.
Only consistent database backups can be performed.
D.
Archived redo log files are backed up.
E.
Only used data blocks can be backed up as backup sets.