Which two statements correctly describe IS-IS adjacencies? (Choose two.)
A.
Level 2 adjacencies can form within the same (intra) area only.
B.
Level 2 adjacencies can be established either interarea or intra-area.
C.
Level 1 adjacencies can form in the same (intra) area only.
D.
Level 2 adjacencies are formed between (inter) areas only.