What are the two steps to configure NTP on a Cisco Unified Communications Manager publisher to support SCCP phones?

A.	Restart the Unified Communications Manager services for the publisher and subscribers on the Unified CallManager Serviceability page.
B.	Configure Phone NTP References in Cisco Unified CM Administration.
C.	Configure time in Cisco Unified OS Administration.
D.	Configure the NTP server in Cisco Unified CM Administration.
E.	Configure the NTP server in Cisco Unified OS Administration.