How does a Cisco Unified Wireless Network respond to Wi-Fi channel overlap?

How does a Cisco Unified Wireless Network respond to Wi-Fi channel overlap?
A. It allows the administrator to assign the channels on a per-device or per-interface basis.
B. It segregates devices from different manufactures onto different channels.
C. It analyzes client load and background noise and dynamically assigns a channel.
D. It alternates automatically between 2.4 GHz and 5 GHz on adjacent access points.

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