听力原文： Good morning, everyone. Thank you for joining our training course. I'm your personal trainer, Davidson, and I'm going to give a demonstration how to use this machine: the first thing you will do is sit on the machine. There will be handles by your head. Reach for the handles. You will work this best if your arms are not stretched out but at an angle. If you have to reach too high, the seat is too low. The seat is easily adjustable. Gym equipment in general is made for men. At 5 feet 4 inches tall I always put any seat I am on at the lowest or highest level depending on the piece of equipment. For those of you who know machines my setting is usually 5. I moved the seat up as high as it went and I was able to reach the upper bars without them outstretched. It was very comfortable. My feet did not need to touch the floor. The upper handles are nicely padded no need to wear gloves with this machine.
Where does this talk probably take place？

At the gymnasium
B. At the university classroom
C. At the Davidson's office
D. At the auditorium