What is the most likely cause?

You work as a Network Administrator for McRoberts Inc. The company has a TCP/IP-based network.
You install a new client computer. When you connect the computer to a hub, the activity LED of the
NIC does not lit. You connect the computer to another hub, the LED lits up. When you connect the
computer to the first hub again, the activity LED of the NIC does not lit again. What is the most likely
cause?

A.
The cable through which the computer is connected to the hub is faulty.

B.
The NIC card is faulty.

C.
The port of the first hub on which the computer is connected is faulty.

D.
The LEDs on the back of NIC cards are faulty.