Which task must the engineer perform on the network to implement traffic policing changes?

The engineering team at a large ISP has been alerted a customer network is experiencing high traffic congestion. After a discussion between the ISP and technical personnel at the customer site, the team agrees that traffic to the customer network that exceeds a specific threshold will be dropped.

Which task must the engineer perform on the network to implement traffic policing changes?
A . Configure RSVP to reserve bandwidth on all interfaces when a path is congested.
B . Enable Cisco Discovery Protocol on the interface sending the packets.
C . Enable Cisco Express Forwarding on the interfaces sending and receiving the packets.
D . Set IP precedence values to take effect when traffic exceeds a given threshold.

Answer: D