Joe, a Technician, Was Able to Copy Data at a Site

Multiple Choice

Joe, a technician, was able to copy data at a site with no network equipment between two new laptops, featuring gigabit Ethernet ports, by using a regular straight-through patch cable. Joe then unsuccessfully tried to accomplish the same thing at a different site from his laptop with a gigabit Ethernet port to an older customer unit, which had a 10/100 network port. Which of the following is the cause of this?

A) The customer's laptop does not support auto-MDIX.
B) Joe's laptop does not support auto-MDIX.
C) Straight-through patch cables are prone to crosstalk.
D) The customer's laptop NIC does not support full duplex.