How would clients react to a controller configuration that utilized unsupported channels?

How would clients react to a controller configuration that utilized unsupported channels?

A.
Unsupported channels can cause coverage holes forclients as well as limit their connectivity.

B.
Unsupported channels would be ignored by clients.

C.
Unsupported channels would have no impact on clients. The user would simply need to roam to a
supported channel.

D.
Unsupported channels are not configurable on the controller, thus there would be no impact on clients.