An organization is using a link state routing that is not dependent on IP addressing .Which action enable information across area boundaries in this organization ?

A.
Assign level 1 router interface

B.
Assign level 1 routers to different areas

C.
Assign level 2 router interface to the backbone area

D.
Assign level 2 router to different areas

E.
Assign level 2 router interface to different area