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

A large group of people are seen sitting on bicycles exercising with one another. a woman

pick from the following. (A). pushes a bike and others walk in and see it.; (B). speaks to the camera while more shots are shown of people riding.; (C). talks to the camera and another person rides up and takes pictures.; (D). is seen riding around on the bike and leads onto another video of her working out.;
The answer is:
(B).