Why is critically important to maintain clock synchronization between Cisco NAC Appliance components?

Why is critically important to maintain clock synchronization between Cisco NAC Appliance components?

A.
Log Files will not show the actual time of system events

B.
Cisco NAC Appliance Components communicate using SSL Certificates, which rely on accurate time to function correctly

C.
Accurate time is required when performing vulnerability assessment and remediation

D.
Cisco Switches that are being managed by SNMP messages need to be time synchronized to function