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.