You discover that the Cisco ISE is failing to connect to the Active Directory server. Which option is a
possible cause of the problem?

A.
NTP server time synchronization is configured incorrectly.

B.
There is a certificate mismatch between Cisco ISE and Active Directory.

C.
NAT statements required for Active Directory are configured incorrectly.

D.
The RADIUS authentication ports are being blocked by the firewall.