You must resolve an issue in which an access point is not joining a controller. Which command can help you to troubleshoot the issue?

You must resolve an issue in which an access point is not joining a controller. Which command can help you to troubleshoot the issue?
A . debug enable ap-name from the AP
B . debug capwap events enable from the AP
C . debug enable ap-name from the controller
D . debug capwap events enable from the controller

Answer: D