Several users at your site have reported that they receive a fast busy when they call another site within the same cluster. Which action can you take to connect the problem?

A.	Rebuild the SIP trunk between Cisco Unified Communications Manager and the gateway.
B.	Run RTMT to check the status of the Cisco Unified Communications Manager services.
C.	Reset the intercluster trunk from your site to the remote site.
D.	Correct the grouping of the site partitions and calling search spaces.