How Does Evidence About Aggression and Testosterone in Males Contradict

How does evidence about aggression and testosterone in males contradict the idea that biology alone defines the difference between male and female?

A) Surgical intervention performed to reduce testosterone results in lower levels of aggression.
B) Aggressive behavior may increase testosterone levels.
C) Hormone levels are fixed at birth and are the reason for aggressive behavior in males.
D) Behavioral evidence in higher primates clearly shows that males are more aggressive than females.