You have configured an IS-IS adjacency between routers R1 and R2. However, the
adjacency is not coming up. Referring to the exhibit, what appears to be the problem?

A.
The ge-1/1/2.0 interface has IS-IS level 2 disabled.

B.
The ge-1/1/2.0 interface does not have family iso configured.

C.
The ge-1/1/2.0 interface has IS-IS level 1 disabled.

D.
The R2 interface is down.