This is a test of commonsense with single/multi-choices. Complete the next sentence:

A camera pans around a set of stairs and leads into people working out in a class. several shots

Select from: a). are shown of people putting their feet on a track and discusses the purposes behind pumping up energy.; b). are shown of people playing dodgeball inside of a gym and back up to watch the competition.; c). are shown followed by people sitting on metal exercise bikes and moving up and down the machine.; d). are shown of people working out together while a man speaks to the camera.;
The answer is:
d).