What are possible reasons for this output?

A network engineer issues the aaa test-server pap RADIUS01 test aruba1command on the Aruba controller CLI.

This output displays:

(Controller) #aaa test-server pap RADIUS01 test aruba1

Authentication timeout

What are possible reasons for this output? (Choose three.)
A . The source IP address for the RADIUS requesting packet does not match the RADIUS client IP configured on the RADIUS server.
B . The RADIUS client is disabled on the RADIUS server.
C . The firewall restrict the RADIUS authentication traffic between the controller and the RADIUS server.
D . The authentication method PAP is not enabled on the RADIUS server.
E . The authentication method PAP is not enabled in the AAA authentication profile of the Aruba Controller.