Which additional three steps are required to make SIP URI dialing work between the clusters?

A company has one CUCM located in North America and another cluster located in Europe. IT department has piloted deployment to enable SIP URI dialling and call from video endpoints between clusters. The engineer performs following three steps,
-Define Cluster ID on both CUCM clusters
-Exchange tomcat certificates with other nodes
-Setup Role option for primary/hub cluster
Which additional three steps are required to make SIP URI dialing work between the clusters? (Choose three)
A. Configure the route list
B. Define SIP route pattern
C. Setup role option for secondary cluster/spoke cluster
D. Configure the hunt list
E. Configure the SIP trunk
F. Configure the route pattern
G. Configure the hunt pilot