Which two statements are true about a whole consistent backup of a database running in ARCHIVELOG mode?

You are using R MAN to back up your database. All the data files are in read/write mode.
Examine the RMAN configuration parameters:

Which two statements are true about a whole consistent backup of a database running in ARCHIVELOG mode? (Choose two.)
A. The backup can be used as an incremental level 0 backup.
B. The database instance must be shut down to take the backup.
C. The database must be in MOUNT state to take the backup.
D. The backup consists of blocks that have been formatted,
E. The system Change Number (SCN) is the same for all the data files in the backup.

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