Answer:
The correct answer is option a. "heredity".
Step-by-step explanation:
Nowadays is still not clear the degree at which heredity and environmental factors affect social behaviors such as aggression. In this example Constance is focused on aggression being caused mainly by genetic inheritance. On the other hand, Agatha believes that people are capable of freely making voluntary choices. Therefore, it could be assumed that Constance rejects environmental factors, while Agatha rejects heredity as the factor that affects aggression.