Which two rules about ISIS adjacencies must you consider when carrying out the configuration?

Your company has purchased two new Juniper Networks MX480 routers. Your manager has asked you to add these two devices to the existing ISIS network.

Which two rules about ISIS adjacencies must you consider when carrying out the configuration? (Choose two)

A.
For Level 1 adjacencies, area IDs must be the same

B.
For Level 2 adjacencies area IDs must be the same

C.
The IS-IS levels configured on the interfaces must be the same

D.
The IS-IS levels on the interfaces can be different