When using SIP in a Cisco Unified Contact Center Enterprise deployment with Cisco Unified IP
IVR, how does the Cisco Unified IP IVR support DTMF?

A.
by DTMF using KPML and does not require additional MTP resources

B.
by using KPML and does require additional MTP resources

C.
by using RFC 2833 and does not require additional MTP resources

D.
by using RFC 2833 and does require additional MTP resources