Grace Has Been Working Out at a Weight-Lifting Gym with Mostly

Grace has been working out at a weight-lifting gym with mostly male members, resulting in exposure to androstadienone. She notices that after being at the gym, she experiences changes in mood. When she tells you about this experience, you explain that __________.

A) pheromones produce menstrual synchrony
B) steroid use in males causes a deterrent to sex
C) she is unable to have a menstrual cycle because she is not exposed to enough female sweat
D) this is most likely a result of pheromones naturally occurring in male sweat