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 R2 interface is down.
B.
The ge-1/1/2.0 interface has IS-IS level 2 disabled.
C.
The ge-1/1/2.0 interface does not have family iso configured.
D.
The ge-1/1/2.0 interface has IS-IS level 1 disabled.
Explanation: