A user reports that when calling an auto-attendant, they receive a fast busy signal. Which two options can cause this issue?

A.	An improperly configured dial peer is in the Cisco Unified CME.
B.	The auto-attendant service is not running.
C.	No call-in number is specified for the auto-attendant.
D.	A prompt is missing in the auto-attendant.
E.	An improperlyconfigured ephone-dn is in the Cisco Unified CME.