William states that the Ethernet ports do not function on his Mac Pro (Mid 2012) when plugged into the network at his office. He demonstrated that he knows how to
connect Ethernet cables and was able to connect to the Internet on your known-good Ethernet network. You ran MRI and and the computer passed all tests when
run using either Ethernet port. What question should you ask the customer next?

A.
Are any other computers able to connect to Ethernet at the office?

B.
Have you installed all system software and firmware updates?

C.
How did you damage your Ethernet cable at the office?

D.
Did you change the default network settings?