Which three items should be considered when restoring a backup to a Cisco VCS Expressway? (Choose three.)
A. A restart is required to complete the system restore process.
B. If the backup file is encrypted, an encryption password will be needed.
C. A valid backup configuration file must be accessible.
D. A function SFTP server is needed for remote restore.
E. The VCS expressway must be put into maintenance mode during the upgrade.
F. A flash drive that is connected to the appliance can be used to restore the configuration.
G. Cisco TMSXE can be used to process and restore backups.