Options are:
[1]. are several other people in the room with them as they sit on stools.
[2]. are people following her on the bicycles tracks.
[3]. are other customers sitting in the building including a barista and a person working out.
[4]. a few other women who are also biking the stationary bikes.Choose from options above and answer: What most naturally follows?

She is talking about how to use the equipment. The personal trainer is using an exercise bicycle and peddling the cycle very vigorously. there
Answer:
[4].