You have just finished replacing the motherboard in your friend Ethan's computer with the same type of motherboard that the computer had originally. You tested the motherboard by powering it on and by verifying that the operating system started and that the applications work.

Now Ethan is complaining that his computer no longer recognizes his external hard drive, which he had connected to the previous motherboard.

Which of the following is MOST likely causing the external hard drive not to function?

answer

The hard drive has failed.

The USB front panel connector was not properly connected.

The replacement motherboard does not support external hard drives.

The computer's power supply was not connected properly.