What Causes Some Babies to Be Born with External Genitals

Multiple Choice

What causes some babies to be born with external genitals intermediate between male and female?

A) A female fetus is exposed to a high fever because of her mother's illness.
B) ​A female fetus is exposed to less than the usual amount of estrogens.
C) ​A male fetus is exposed to more than the usual amount of estrogens.
D) ​A female fetus is exposed to more than the usual amount of testosterone.