Why Are Women Usually Older Than Men Before Symptoms of Hereditary

Why are women usually older than men before symptoms of hereditary hemochromatosis manifest?

A) Women have a counterbalancing normal gene on their second X chromosome.
B) Women lose some iron with normal menstruation during childbearing years.
C) Men have a larger muscle mass and more iron-storing capability than women.
D) Men have greater expression of the gene for hemoglobin than do women.