Which statement about the Lightweight Access Point Protocol （LWAPP） protocol is true？（）

• A、 The processing of 802.11 data and management protocols and access point capabilities is distributed  between a lightweight access point and a centralized WLAN controller.
• B、 LWAPP aggregates radio management forward information and sends it to a wireless LAN solution  engine.
• C、 LWAPP authenticates all access points in the subnet and establishes a secure communication channel  with each of them.
• D、 LWAPP advertises its WDS capability and participates in electing the best WDS device for the wireless  LAN