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What is the purpose of the recover command? (Choose all that apply.)
A. Recover database datafiles from physical disk backup sets.
B. Recover required incremental backups from physical disk backup sets.
C. Recover required archived redo logs from physical disk backup sets.
D. Apply incremental backups to recover the database.
E. Apply archived redo logs to recover the database.

　　The recover command will recover the needed incremental backup and archived 
redo logs from backup sets for recovery purposes.The recover command will then apply
the incremental backups and archived redo logs as needed to recover the database.