Which of the Following Is Not a Reason for the Wage

Which of the following is not a reason for the wage differential between females and males?

A) The choice of major in college by females tends to be different than the choice by males.
B) The existence of employer prejudice.
C) The number of males is usually greater than the number of females in the labor force.
D) Females bear the primary responsibility of childbearing.
E) Women accept lower wages for flexible and shorter working hours.