What are two reasons why time synchronization between FortiGate and its managed FortiSwitch is critical in switch management? (Choose two.)

What are two reasons why time synchronization between FortiGate and its managed FortiSwitch is critical in switch management? (Choose two.)
A . FortiSwitch does not retain its time after a reboot, which gets reset after each reboot.
B . FortiSwitch will not be able to become an NTP server for downstream devices.
C . FortiSwitch cannot complete the DTLS handshake used in the CAPWAP tunnel.
D . FortiSwitch will not allow other FortiSwitch devices in the chain be discovered by FortiGate.

Answer: A, C