Refer to the exhibit.

A Cisco 7200 Series Router is directly connected to a Cisco Catalyst 3560 Series Switch over a
Gigabit Ethernet link. It takes an average of 50 seconds after bringing up both ends of the link for
data traffic to flow across the link. Which of the following would allow the link to forward data traffic
within a few seconds after bringing up both ends of the link?

A.
On the switch, enable PortFast.

B.
On the router, disable ARP on the interface.

C.
On both the router and the switch, set the interface duplex to half.

D.
On both the router and the switch, manually configure the MAC addresses.