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 |