The LWAPP （Lightweight Access Point Protocol） is in use within the Company wireless LAN.  Which statement is true about this protocol？（）

• A、 Real-time frame exchange is accomplished within the access point.
• B、 The control traffic between the client and the access point is encapsulated with the LWAPP. 
• C、 Authentication， security， and mobility are handled by the access point.
• D、 Data traffic between the client and the access point is encapsulated with LWAPP.
• E、 None of the other alternatives apply