Which DTMF relay method configured on a SIP dial-peer will ensure that a media resource is not invoked by Unified CM for calls to UCCX IVRs?

Which DTMF relay method configured on a SIP dial-peer will ensure that a media resource is not invoked by Unified CM for calls to UCCX IVRs?
A . dtmf-relay sip-kpml
B . dtmf-relay rtp-nte
C . sdtmf-relay h245-signal
D . dtmf-relay sip-notify

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Answer: D