Which of the following two parameters must you specify to use a flash recovery area for all of your backups? (Choose two answers.)

Answer: A,C

Explanation: DB_RECOVERY_FILE_DEST_SIZE specifies the maximum space used by the recovery-related files, even if more or less space is available at the destination. DB_RECOVERY_FILE_DEST specifies the location for all recovery-related files. B is incorrect because DB_RECYCLE_CACHE_SIZE does not control any aspect of the flash recovery area. D is incorrect because there is no such parameter as DB_RECOVERY_FILE_SIZE.