In comparing IS-IS with OSPF, a Level-1-2 IS-IS router is similar to which kind of OSPF router?

A.	ASBR on a normal OSPF area
B.	ASBR on NSSA
C.	ABR on totally stubby OSPF area
D.	ABR on stubby OSPF area
E.	ABR on a normal OSPF area