Multi-select problem: How does the next paragraph end?

A piece of exercise equipment is put together through technology and then shown in real time. a person's hand

Choose your answer from: (A). is then shown pointing to the steps, and then guides them up the step or the tire. (B). the use the equipment for several seconds. (C). is holding a piece of exercise equipment and then his arm is shown with a different piece of exercise equipment. (D). turns a knob on the machine and begins running on the machine.
(D).