An IP phone user dials into Cisco Unity Connection and hears the reorder tone. What could be the two possible issues?

A.	The parameter Register with Session Initiation Protocol Server is not set on the trunk-group configuration page.
B.	The parameter Register with Session Initiation Protocol Server is not set on the port-group configuration page.
C.	The parameter Register with Session Initiation Protocol Server is not set on the hunt-group configuration page.
D.	The Cisco Unified Presence servers need to be sorted in the order in which the IP phones are registered
E.	The Session Initiation Protocol servers need to be sorted in the order in which the IP phones are registered.
F.	The Cisco Unified Communications Manager servers need to be sorted in the order in which the IP phones are registered.