You asked to deploy a large-scale IS-IS network with multiple areas.
In this scenario, which two statements are true? (Choose two.)

A.
The area IDs must be the same for Level 2 routers to from an adjacency.

B.
Level1 routers can from an adjacency with any other Level 1 router.

C.
Level1 routers can from an adjacency with any other Level 2 router.

D.
The area IDs must be the same for Level1 routers to from an adjacency.