Aaron Has Always Had an Irritable Temperament

Aaron has always had an irritable temperament. As a baby, he often cried and was difficult to soothe. As a toddler, he threw temper tantrums if he didn't immediately get something he wanted. As a preschooler, he was moody and unpredictable. He's often so ornery that other people-even family members-simply don't want to be around him very much. Which one of the following principles best describes this situation?

A) Children's natural tendencies affect their environment.
B) The relative effects of heredity and environment vary for different developmental domains.
C) Inherited tendencies make children more or less responsive to particular environmental influences.
D) For some aspects of development, when certain environmental conditions are present is just as important as whether they are present.