Two Groups of Boys Between the Ages of 10 and 15

Multiple Choice

Two groups of boys between the ages of 10 and 15 watched two hours of television and then played for an hour. One group watched violent television shows while the other group watched nonviolent shows. The results indicated that the boys who watched the violence would hit each other twice as often during the playtime as those who watched the nonviolent shows. What is one shortcoming of this type of experiment?

A) Creating an artificial social environment does not produce accurate results.
B) If the boys lose interest in the violent shows, they will not be influenced as intended.
C) It's in a boy's nature to hit another boy during play.
D) Other factors may lead to the violence during play.