In a "Natural Experiment" Studying the Level of Aggressiveness in People

Multiple Choice

In a "natural experiment" studying the level of aggressiveness in people undergoing a sex change,it was found that women who became men because more aggressive.One likely causal explanation is they

A) were more aggressive to start with.
B) are more aggressive because they are stigmatized.
C) are receiving testosterone,which is linked to aggression.
D) have larger amygdalas.