To properly configure the _cisco-uds _tcp.<domain> DNS SRV record, the administrator needs to know which servers are running the Cisco User Data Services service By default, which servers run this service?

A.	Only the publisher node.
B.	The service is disabled by default and then enabled as required on a per-node basis.
C.	All servers in a Cisco Unified Communications Manager cluster.
D.	All call processing nodes in a cluster.