Which two statements are true in this scenario?

Your database is running in ARCHIVELOG mode. You want to take a consistent whole database backup.
Which two statements are true in this scenario?

A.
The user-managed backup consists of only formatted data blocks.

B.
The database must be shut down to take a user-managed backup.

C.
The RMAN backup contains only data files.

D.
The RMAN backup can be performed while the database is open.

E.
The database must be in MOUNT state to take RMAN backup.