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
