During Menopause, Lower Levels of Estrogen Cause a Woman's Bone

During menopause, lower levels of estrogen cause a woman's bone to break down, releasing calcium to the body. How might this affect the levels of calcitonin and parathyroid hormone (PTH) in an otherwise healthy woman going through menopause?

A) Her levels of calcitonin should be high and her levels of PTH should be low.
B) Her levels of calcitonin should be low and her levels of PTH should be high.
C) Her levels of both calcitonin and PTH should be high.
D) Her levels of both calcitonin and PTH should be low.