Which two are true about configuring the fast recovery area?

Which two are true about configuring the fast recovery area?

A.DB_FLASHBACK_RETENTION_TARGET must be set if defining a retention policy.

B.DB_RECOVERY_FILE_DEST_SIZE must be set if DB_RECOVERY_FILE_DEST is set.

C.DB_RECOVERY_FILE_DEST must be set when configuring flashback for the database.

D.Archive log destinations must be specified using LOG_ARCHIVE_DEST_n parameters.

E.USE_DB_RECOVERY_FILE_DEST must be explicitly set to LOG_ARCHIVE_DEST_10.

正确答案是BC