It's not A, "Enable the Avoid Persistent Non-WiFi interference option," because this option, while it does make the system aware of persistent non-WiFi interference, doesn't necessarily prompt an immediate channel change. This setting helps the system to recognize and avoid areas of persistent interference when making decisions on channel assignments during its regular update intervals, rather than triggering an immediate response to interference.
Option C, "Enable the Event Driven RRM," is more directly involved in making real-time adjustments to the RF environment, including immediate channel changes in response to detected interference. This is why C is the more effective choice for resolving the issue described, as it actively and dynamically responds to interference detected by Cisco CleanAir.