In the event that the primary FortiManager fails, which of the following actions must be performed to return the FortiManager HA to a working state?

In the event that the primary FortiManager fails, which of the following actions must be performed to return the FortiManager HA to a working state?
A . Secondary device with highest priority will automatically be promoted to the primary role, and manually
reconfigure all other secondary devices to point to the new primary device
B . Reboot one of the secondary devices to promote it automatically to the primary role, and reconfigure all other secondary devices to point to the new primary device.
C . Manually promote one of the secondary devices to the primary role, and reconfigure all other secondary devices to point to the new primary device.
D . FortiManager HA state transition is transparent to administrators and does not require any reconfiguration.

Answer: C