Which option describes where you set up the toll-fraud prevention feature that drops any calls from a conference if no on-net users are still connected?

Which option describes where you set up the toll-fraud prevention feature that drops any calls from
a conference if no on-net users are still connected?

A.
in the service parameters for the Ad Hoc Conference Service

B.
in the service parameters for Cisco IP Voice Media Streaming App

C.
in the service parameters for Cisco CallManager

D.
in the enterprise parameters