To configure a pair of interfaces so that the standby interface can replace a dedicated interface on the partner appliance in a cluster, you must have ____________.

A.
two single MAC-address interfaces: one on each appliance in the cluster

B.
one IP address to be used by the takeover partner

C.
four single MAC-address interfaces: two on each appliance in the cluster

D.
four IP addresses: two on each appliance in the cluster