An RMAN backup job fails， displaying the following error：  ORA/x7f19809： limit exceeded for recovery files  Your analysis shows that the Flash Recovery area is full. Which two actions could you take to resolve the error and avoid this error in future？（）

• A、take the backup of the flash recovery area less frequently
• B、increase the value of the UNDO_RETENTION initialization parameter
• C、change the value of the WORKAREA_SIZE_POLICY initialization parameter to AUTO
• D、change the backup retention policy to retain the backups for a smaller period of time 
• E、increase the value of the DB_RECOVERY_FILE_DEST_SIZE initialization parameter
• F、increase the value of the CONTROL_FILE_RECORD_KEEP_TIME initialization parameter