Which of the Following Best Describes How Early Sexual Differentiation

Which of the following best describes how early sexual differentiation affects the brain according to the text?

A) Depending on whether Y chromosomes are present or not,the shape of the brain becomes more football-like compared to circular.
B) Depending on whether testosterone or estrogen is present,cells in the cerebellum grow or deteriorate.
C) The brain is not affected by sexual differentiation.
D) Depending on whether testosterone or estrogen is present,cells in the hypothalamus either become sensitive to estrogen or insensitive to estrogen.