Which scenario shows a division of labor?

O A. In the lunchroom line in the school cafeteria, two workers serve the food to all the students.
O B. On an assembly line at a car factory, some workers attach windows todays while others paint the cars.
O C. At the toll stops on a major road, one worker collects money in one toll booth while another worker collects money in a different toll booth.
O D. At the museum, there are always several people available to provide guided tours for people who are interested in learning more about the museum's collections.​