Which real time debug should an administrator enable to troubleshoot RADIUS authentication problems?

A.
diagnose debug application radius -1.

B.
daignose debug application fnbamd -1.

C.
diagnose authd console-log enable

D.
diagnose radius console-log enable

Explanation:
http://help.fortinet.com/fadc/4-2-2/cli/index.html#page/FortiADC_CLI_Reference/diagnose_debug_application.html