R2 has IS-IS adjacencies with R3 and R4. You want to ensure that R2 has both a level 1 and level 2 adjacency to both R3 and R4, but R2 only has one adjacency with R4.
Referring to the exhibit, which configuration change will solve this issue?
A. Change the IS-IS area on R4 to match R2.
B. Remove the level 1 disable configuration from R4.
C. Remove the level 1 disable configuration from R2.
D. Change the IS-IS area on R2 to match R4.
I think the answer is A