What is the result if a client radio is incapable of supporting all the 5 GHz channels you have deployed in the controller or APs?

What is the result if a client radio is incapable of supporting all the 5 GHz channels you have deployed in the controller or APs?
A. You may only be able to deploy 20 MHz-wide channels.
B. This may result in the client having to roam more frequently to find a channel it supports.
C. This may result in coverage holes in the network.
D. You may only be able to deploy 40 MHz-wide channels.