What are the minimum requirements for Cisco PfR to provide routing control?
A. one master controller, two border routers, two internal interfaces, and two external interfaces
B. one master controller, one border router, one internal interface, and two external interfaces
C. one master controller, two border router, one internal interface, and one external interface
D. one master controller, one border router, two internal interfaces, and one external interface,
E. two master controllers, one border router, one internal interface and one external interface
