Which statement is true regarding File description (FD) conserve mode?

Which statement is true regarding File description (FD) conserve mode?
A . IPS inspection is affected when FortiGate enters FD conserve mode.
B . A FortiGate enters FD conserve mode when the amount of available description is less than 5%.
C . FD conserve mode affects all daemons running on the device.
D . Restarting the WAD process is required to leave FD conserve mode.

Answer: B