The answer is B) but if not then it's C)
Social norms or social expectations
Answer: The one out of the following that is true of aggression is:
c. Men are more likely than women to engage in physical aggression.
Explanation: Men in their makeup are species who have ego to protect than women and if it would cause them to be physically aggressive to protect their ego they would. That is why men have more tendency to be physically aggressive than women.
The same reason the Japanese attacked Pear Harbor.