How Do Gender Differences in Physical Strength Relate to the Wage

How do gender differences in physical strength relate to the wage gap between men and women?

A) Men use strength requirements as a rationalization for their higher salaries.
B) Women accept that physical strength is a valid reason for men earning higher salaries.
C) Physical strength was once the basis for the wage gap, but now educational attainments provide that basis.
D) There is no relationship because the wage gap disappeared during the mid-1990s.