Testosterone Levels Are 10 to 20 Times Lower in Women

Testosterone levels are 10 to 20 times lower in women than in men and vary across the menstrual cycle; this suggests that

A) testosterone does not play a significant physiological role in women.
B) progesterone is more important than testosterone for arousability in women.
C) changes in testosterone may contribute to changes in women's sex drive at different times in the menstrual cycle.
D) higher testosterone levels are responsible for increased sexual fantasy in men.
E) women are 10 to 20 times less interested in sex than men are.