What is the next logical step in troubleshooting Cisco Unified Presence and Cisco Unified Personal
Communicator in a live production environment if the Cisco Unified Presence System
Troubleshooter and Server Health Tools do not help resolve the issue?

A.
Restart the Cisco Unified Presence server.

B.
Restart Cisco Unified Communications Manager.

C.
Enable tracing and use Cisco Unified RTMT to review the traces.

D.
Uninstall and re-install Cisco Unified Personal Communicator.

E.
Reset the Presence Gateway.