which of the following is true of changes in sexuality and related hormones that often occur in middle age (e.g., menopause in women and erectile dysfunction in men)?
A. Testosterone levels increase in both men and women during middle age.
B. Menopause is characterized by an increase in fertility in women.
C. Erectile dysfunction is primarily caused by hormonal changes in men.
D. Menopause is a natural biological process in women marked by the end of menstruation and a decrease in estrogen levels.