The physiological change that most differentiates men and women during middle adulthood is
a. child rearing.
b. declining physical abilities.
c. menopause.
d. midlife crises.

The correct answer is C.

Menopause physiologically only affects women during middle adulthood which would be from around 40 - 60 years old. Menopause causes great hormonal changes in a women at this time in her life when her menstrual cycle ends, whereas men do not experience this at all.

answer; i believe the correct answer is (progesterone);