Refer to the Cisco IOS XR configuration exhibit.
Which statement about the configuration is true?
A . This is a Level-2-only router.
B . This is a Level-1-only router.
C . The maximum IS-IS path metric is 63.
D . This router belongs to area ID 0001.
E . This configuration is missing the net configuration for the IPv6 unicast address family.
Answer: D