What is a good next step for troubleshooting?

You have deployed a new Aruba Mobility Controller (MC) and campus APs (CAPs). One of the WLANs enforces 802.IX authentication lo Aruba ClearPass Policy Manager {CPPM) When you test connecting the client to the WLAN. the test falls You check Aruba ClearPass Access Tracker and cannot find a record of the authentication attempt You ping from the MC to CPPM. and the ping is successful.

What is a good next step for troubleshooting?
A . Renew CPPM’s RADIUS/EAP certificate
B . Reset the user credentials
C . Check CPPM Event viewer.
D . Check connectivity between CPPM and a backend directory server

Answer: C