What is the role of the Cisco TSP software installed on the client PC?

What is the role of the Cisco TSP software installed on the client PC?

A.
send TAPI messages to the Cisco CallManager Express when a call is placed or received

B.
provide call control messages to the Cisco CallManager

C.
monitor TAPI messages sent from the Cisco CallManager Express TSP and send them to the Cisco CRM Communications Connector software

D.
monitors http requests sent from the Microsoft CRM Server