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

A man is sitting on a chair in front of a store playing a guitar like a drum while people is walking in front of him . a couple

OPTIONS:
1). of people in an office are sitting behind their desk doing crossword puzzles.;
2). of fans are in the background, holding banner.;
3). is playing copernicine on a stage.;
4). are talking in front of the store and drinking water.;
The answer is:
4).