Acme Booster Corporation has a corporate policy stating that all routing devices will have their configurations backed up to a corporate server on a weekly basis. Their CUE module is a component of the Cisco CallManager Express device. Which three parameters will ensure successful backup of the CUE module configuration?（）

• A、ATFTP server must be present and available to the CUE module. 
• B、The CUE module must have modify permissions on the backup server directory. 
• C、The CUE module must be in an offline mode prior to instituting the backup. 
• D、An FTP server must be present and available to the CUE module. 
• E、The CUE module must copy the configuration and messages to separate directories on the backup server. 
• F、The CUE module must have read and write permissions on the backup server directory.