问题：

[多选] Which two Cisco Wireless Control System （WCS） statements are true？（）

A . the WCS Base version includes all the features of the WCS Location version as well as additional enhancements
B . the WCS Base version provides on-demand location of rogue access points and clients to within 33 feet （10 meters）
C . WCS adds a graphical view of multiple Cisco Wireless LAN controllers and managed access points
D . WCS includes a network management tool which is similar to a site survey tool
E . WCS uses the CDP protocol to communicate with the controller