Refer to the exhibit. 
Which statement is true?
A.
The Cisco PfR state is UP; however, the external interface Et0/1 of border router 10.1.1.1 has
exceeded the maximum available bandwidth threshold.
B.
The Cisco PfR state is UP; however, an issue is preventing the border router from establishing
a TCP session to the master controller.
C.
The Cisco PfR state is UP and is able to monitor traffic flows; however, MD5 authentication has
not been successful between the master controller and the border routers.
D.
The Cisco PfR State is UP; however, the receive capacity was not configured for inbound
traffic.
E.
The Cisco PfR state is UP, and the link utilization out-of-policy threshold is set to 90 percent for
traffic exiting the external links.