Which two statements are true of IS-IS?

Which two statements are true of IS-IS? (Choose two.)

A.
When configured on a broadcast segment, IS-IS elects a designated intermediate system that establishes adjacencies with all IS-IS enabled nodes on the segment.

B.
When configured on a broadcast segment, IS-IS forms a full mesh of adjacencies called a mesh group; unlike OSPF, no designated device exists to represent the segment.

C.
When configured on a broadcast segment, IS-IS elects a backup designated intermediate system.

D.
When configured on a broadcast segment, the network itself is called a pseudo-node