Refer to the exhibit. Which outgoing m-line SDP is sent to Cisco UCM after matching the appropriate dial peers via Cisco Unified Border Element?
A. m=audio 16550 RTP/AVP 0 8 18a=rtpmap:0 PCMU/8000/1 a=rtpmap:8 PCMA/8000/1 a=rtpmap:18 G729/8000/1
B. m=audio 16550 RTP/AVP 18 0a=rtpmap:0 PCMU/8000/1 a=rtpmap:18 G729/8000/1
C. m=audio 16550 RTP/AVP 8 0 18a=rtpmap:0 PCMU/8000/1 a=rtpmap:8 PCMA/8000/1 a=rtpmap:18 G729/8000/1
D. m=audio 16550 RTP/AVP 18 0a=rtpmap:8 PCMA/8000/1 a=rtpmap:0 PCMU/8000/1 a=rtpmap:18 G729/8000/1
I think it should be B because the cucm doesnt change the codecs when it receives an invite