According to the Text, Which of the Following Is a Justification

According to the text, which of the following is a justification used for paying women less than men?

A) Women are paid according to how many children they have, or for being single moms.
B) Women are paid less on the basis of special gendered skill requirements.
C) Women are paid less on the assumption they already have a male breadwinner at home.
D) Women are considered unsuitable in emerging service sector jobs due to lack of education.