Which action should the administrator take to resolve this issue?

Refer to the exhibit.

Persistent Chat is configured in the Cisco IM and Presence server using PostgreSQL as the back-end database. Users report that the Chat Rooms icon is missing from their Cisco Jabber clients. Which action should the administrator take to resolve this issue?
A. Start the Cisco XCP Message Archiver.
B. Restart the Cisco XCP Directory Service.
C. Start the Cisco XCP Text Conference Manager.
D. Restart the Cisco XCP XMPP Federation Connection Manager.