When a SIP trunk is added for Call Control Discovery, which statement is true?

A.	The SIP trunk is added by selecting SIP Trunk and SIP Protocol. The Enable SAF check box should be selected.
B.	The SIP trunk is added by selecting SIP Trunk and SIP Protocol. The Trunk Service Type should be Call Control Discovery.
C.	The SIP trunk is added by selecting Call Control Discovery Trunk and then selecting SIP as the protocol to be used.
D.	The SIP trunk is added by selecting SIP Trunk and SIP Protocol. The destination IP address field is configured as ‘SAF’ to indicate that this trunk is used for SAF.