While observing a full simulation of the business continuity plan, an IS auditor notices that the notification systems within the organizational facilities could be severely impacted by infra structural damage. The BEST recommendation the IS auditor can provide to the organization is to ensure:

A. the salvage team is trained to use the notification system.
B. the notification system provides for the recovery of the backup.
C. redundancies are built into the notification system.
D. the notification systems are stored in a vault.