What is the cause of the issue?

An end user at a remote site is trying to initiate an Ad Hoc conference call to an end user at the main site. The conference receives an error message on the phone: Cannot complete conference call.

What is the cause of the issue?
A . The transcoder resource Is missing.
B . The remote phone does not have the conference feature assigned
C . A software conference bridge is not assigned.
D . A Media Termination Point is missing.

Answer: A