The suggested answer is A, B.
To successfully perform a live migration, it is essential that all AHV hosts have IP addresses in the same subnet and are configured on the same VLAN. The migration process occurs at the hypervisor level, and thus, it relies on the management and network configuration of the hosts rather than the VM networks or IP addresses. The configuration involves ensuring that hypervisors can communicate effectively, which requires them to be in the same subnet and VLAN.