Which task must be completed so that the caller hears MOH instead of silence when the MTP resource gets invoked at one of the call legs?

Which task must be completed so that the caller hears MOH instead of silence when the MTP
resource gets invoked at one of the call legs?

A.
Configure unicast MOH or tone on hold instead of multicast MOH.

B.
Configure multicast MOH instead of unicast MOH or tone on hold.

C.
Configure software DSP instead of hardware DSP.

D.
Configure hardware DSP instead of software DSP.