Which two installations must be completed to allow third-party software to interact with the Cisco Unified CallManager Express system through TAPI Lite?（）

A、the files in the Cisco IOS TSP file on all Windows PCs on the LAN 

B、both the Cisco IOS TSP and TAPI Lite files on all Windows PCs on the LAN 

C、the Cisco TAPI Lite files on the same Windows PC where the software is installed 

D、the files in the Cisco IOS TSP file on the same Windows PC where the software is installed 

E、the Cisco IOS TSP on the same Windows PC where the software is installed and on all remote teleworker PCs