What is the most likely cause of the failure?

Refer to the topology exhibit.

642-427-troubleshooting-cisco-unified-communications_img_120

When the Cisco Unified Communications Manager at the BR1 site loses connectivity to the SAF network, the call to extension 3001 fails to reroute via the PSTN. Examine the SDI trace in the exhibit.
What is the most likely cause of the failure?

642-427-troubleshooting-cisco-unified-communications_img_121

642-427-troubleshooting-cisco-unified-communications_img_123

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A. The full E.164 number for extension 3001 could not be constructed.
B. The Cisco Unified Communications Manager at the HQ site was unable to determine the ToDlD number to extension 3001.
C. The calling phone line CSS does not have access to the V route pattern.
D. CCD requesting service does not have the correct partition configured for CCD learned patterns
E. The AAR CSS for the HQ phone does not have access to the \\ route pattern.

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