What communication link is necessary in order to establish cluster peer relations between
two clusters?

A.
The cluster interface on each node must be able to communicate with the intracluster
interface on each node in the peer cluster.

B.
The cluster interface on each node must be able to communicate with the node-mgmt
interface on each node in the peer cluster.

C.
The intracluster interface on each node must be able to communicate with the intracluster
interface on each node in the peer cluster.

D.
The intercluster interface on each node must be able to communicate with the intercluster
interface on each node in the peer cluster.