An employee's office has an RJ-45 wall jack, which connects to a switch port on a switch that was manufactured in 2001 and is located in the wiring closet. The wall jack normally connects to the user's PC via a patch cable. On Monday morning, this user borrowed a patch cable from a co-worker's office (the cable that connected his co-worker's PC to the wall jack) and used it to connect from the wall jack to an old four-port hub he brought in from home that morning. He powered on the hub, and then connected his work computer to the hub with his original patch cable. Based on this scenario, which of the following is true?A. The switch (in the wiring closet) that is now connected to the hub (in the worker's office) has four additional collision domains. B. The user PC will have access to the corporate network, but at reduced throughput. C. The switchport will operate at half duplex because it is connected to a hub. D. The user PC will not have any access to the corporate network through the switch.