How can a network administrator determine whether the RADIUS server rejected the credentials or another issue occurred?

An Aruba Mobility Master (MM)-based solution has a WLAN that uses WPA2-Enterprise security. A test login on a wireless client fails.
How can a network administrator determine whether the RADIUS server rejected the credentials or another issue occurred?
A. Use the tools in the MM Dashboard > Security window.
B. Use the MC AAA Server Test Diagnostic tool.
C. Ping the IP address configured as the RADIUS server.
D. View Technical Support information for the MM.

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