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