Which effect of this configuration is true?

Refer to the exhibit

Which effect of this configuration is true?
A . The two routers fail to form a neighbor relationship because they have different IS-IS area types.
B . The two routers successfully form a neighbor relationship.
C . The two routers fail to form a neighbor relationship because the authentication configuration is missing.
D . The two routers fail to form a neighbor relationship because their system IDs are different.

Answer: B