When more than one AP-Manager interface is provisioned on a wireless LAN controller, how is the request handled by the AP?

When more than one AP-Manager interface is provisioned on a wireless LAN controller, how is the request handled by the AP?

A. The discovery response from the AP to the AP-Manager interface disables the WLAN port. B. The AP join request fails and must be configured statically on the AP-Manager interface. C. The AP-Manager with the fewest number of APs is used by the AP to join. D. The first AP-Manager interface to respond is chosen by the AP.