What is causing the change in failover state to occur?

TWO LTM devices are in the same Device Group and configured for Ac live/Standby Failover. The LTM Specialist observes that the HA Active and Standby device constantly changes state. All network links use the default route domain A dedicated fiber ink is used for the HA connection with a latency of 250 ms but no packet loss.

What is causing the change in failover state to occur?
A . The HA network is using the default routing domain.
B . The HA network is using multicast I
D . The HA network is not configured for mirroring.
E . The HA network latency is too high.

Answer: B