Which two of these can cause registration problems for a Cisco TelePresence Codec C40 endpoint running in H.323 mode?

A.	The IP default gateway address is incorrect for the endpoint.
B.	The H.323 license stack is not added to the endpoint.
C.	The MAC address for the endpoint has not been added to the Cisco TelePresence VCS.
D.	The E.164 H323Alias has not been configured on the endpoint.
E.	The URI address has not been configured on the endpoint.