Which detail would be most helpful in supporting a report on the importance of recess during the school day?
A) Some schools use recess to play organized group games like kickball, chase, or dodgeball. B) During recess, sometimes students are simply given free time to do whatever they want to do. C) Some students get quite lonely during recess because they don't feel like they have friends. D) Studies have shown that students who have thirty minutes of recess concentrate better upon returning to class.