Which two statements about the WLAN Solution Engine （WLSE） are true？（）

• A、WLSE supports centralized configuration. 
• B、WLSE supports distributed configuration.
• C、WLSE can pick up statistics on a device even if the device is not properly configured.
• D、WLSE can be used to upgrade the firmware on APs and bridges.
• E、WLSE monitors device fault and performance conditions but cannot report any policy misconfigurations