Which of the following statements regarding brain differentiation in males and females is true?
A. One of the new magnetic resonance imaging (MRI) studies have shown that the hypothalamus and amygdala are larger in men than women.
B. The hypothalamus is the only region of the brain that does not show gender differentiation.
C. The primary sex-differentiated structure is the cerebellum.
D. The differences in the brain structures of males and females are "hardwired" differences present from birth.
Answer: A
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