The hormone testosterone controls "maleness" in humans, among other things. How could it possibly be used as a male contraceptive?
A) At low doses, it is an effective spermicide.
B) If levels are decreased in men, they lose some masculinity but also some fertility.
C) Too much testosterone makes men uninterested in sex.
D) Too much testosterone actually reduces sperm production, so it could be used to reduce male fertility.
E) Reducing testosterone levels reduces sperm production.
Correct Answer:
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