Refer to the exhibit.

An administrator replaced the 10/100 Mb NIC in a desktop PC with a 1 Gb NIC and now the PC
will not connect to the network. The administrator began troubleshooting on the switch. Using
the switch output shown, what is the cause of the problem?

A.
Speed is set to 100Mb/s.

B.
Input flow control is off.

C.
Encapsulation is set to ARPA.

D.
The port is administratively down.

E.
The counters have never been cleared.