What is one requirement for ensuring that MCs can update their software without the need for a maintenance window?

What is one requirement for ensuring that MCs can update their software without the need for a maintenance window?
A . MCs must be managed by an MM and connected to the same switch.
B . MCs must be in a cluster and connected in the same VLANs.
C . MCs must be directly connected on at least one port.
D . MCs must have AP licenses assigned to them in a dedicated local pool.

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Answer: D