Refer to the exhibit.

IS-IS adjacency is not established between XR2 and R1. Which action fixes this issue?

A.
unify IS-IS process IDs on each router

B.
configure on R1 under IS-IS is-type level-1-2

C.
configure on R1 under IS-IS area-password CISCO

D.
configure on XR2 under IS-IS under Gi0/0/0/0 address-family ipv4 unicast