Refer to the exhibit.
You are troubleshooting RADIUS issues on the network and the debug radius command returns the given output.
What is the most likely reason for the failure?
A . An invalid username or password was entered.
B . The RADIUS port is incorrect.
C . The NAD is untrusted by the RADIUS server.
D . The RADIUS server is unreachable.
E . RADIUS shared secret does not match
Answer: A