The passage supplies information to answer which of the following questions? A. How does the reduction of space affect intragroup aggression among monkeys in an experimental setting? B. Do family units within a monkey social group compete with other family units for food? C. What are the mechanisms by which the social order of an established group of monkeys controls aggression within that group? D. How do monkeys engaged in aggression with other monkeys signal submission? E. Do monkeys of different species engage in aggression with each other over food?