Which of these reasons can cause intrasite calls within a Cisco Unified Communications Manager cluster to fail?

A.	The route partition that is configured in the CCD requesting service is not listed in the calling phone CSS.
B.	The trunk CSS does not include the partition for the called directory number.
C.	The MGCP gateway is not registered.
D.	The calling phone does not have the correct CSS configured.
E.	The calling phone does not have the correct partition configured.