When designing a large, high-availability wireless network, what changes to a mobility- group would create less load on the controllers while maintaining the same mobility messages?

When designing a large, high-availability wireless network, what changes to a mobility- group would create less load on the controllers while maintaining the same mobility messages?
A . remove unnecessary controllers from the mobility-group to cut down on the controller’s messaging load
B . separate the controllers into different mobility-groups per controller to only send relevant messaging to controllers in different groups
C . configure mobility-group multicast messaging
D . configure the controllers into separate RF-Groups from the mobility-groups to cut down on controller processing load

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Answer: C