An 802.1X client cannot authenticate to an autonomous access point configured for multiple VLANs. The native VLAN does not have an SSID configured. Which one of the following links being down would prevent the clients from authenticating？（）

• A、between the RADIUS and the access point
• B、between the client’s VLAN and the WLSE
• C、between the native VLAN and the WLSE
• D、between the client’s VLAN and the RADIUS