In a R77 ClusterXL Load Sharing configuration, which type of ARP related problem can
force the use of Unicast Mode (Pivot) configuration due to incompatibility on some adjacent
routers and switches?

A.
Multicast MAC address response to a RARP request

B.
Unicast MAC address response to a Multicast IP request

C.
MGCP MAC address response to a Multicast IP request

D.
Multicast MAC address response to a Unicast IP request