Which two configuration elements should be checked to resolve this issue?

CollabCorp is a global company with two clusters, emea.collab corp and apac.collab.corp. URI dialing is implemented and working in each cluster. The company configured routing between clusters to make inter-cluster calls via URI. but this is not working as expected .

Which two configuration elements should be checked to resolve this issue? (Choose two.)
A . directory URI partition
B . SIP route pattern
C . intercluster trunk
D . calling search space and partition
E . SIP trunk

Answer: B,E