A few decades ago it was popular to link dramatic increases in urban antisocial behavior with high population density, and to support this with studies of laboratory rats, which exhibit randomly violent behavior under conditions of extreme overcrowding. It has since become obvious that the analogy between rats and humans is simplistic at best, and leaves out considerations like human adaptability and cultural factors that are of key importance in determining human behavior.
Which of the following, if true, best supports the conclusion the author presents in the passage above?
A) Testing new products on laboratory rats has sometimes led to unnecessary alarm about their adverse effects on human health.
B) Rats thrive in the crowded conditions of human urban society.
C) Rats also exhibit unnatural behavior in conditions of extreme isolation.
D) Although rat behavior does change in crowded conditions, what results is not random violence but a new, radically different social order.
E) In some extremely crowded cities there is relatively little antisocial behavior, whereas some sparsely – populated rural communities have very high rates of such behavior.