Most Men Can Expect Some Changes in Testosterone Levels and Possibly

Most men can expect some changes in testosterone levels and possibly in their sexual function in their 40s.Which of the following changes is most likely?

A) Older men produce less seminal fluid during ejaculation than when they were younger.
B) Most men's sexual response time will be decreased compared to when they were younger.
C) Most older men are much less likely to engage in frequent sexual activity.
D) Men maintain muscle mass and bone density at their youthful levels.