Some Couples Choose the Breadwinner/homemaker Arrangement Even When They Have

Some couples choose the breadwinner/homemaker arrangement even when they have egalitarian beliefs,often because

A) the alternative of being Super Mom is not practical for women of their social class or race.
B) the women have been socialized to accept a move to work full time on the second shift and men were socialized to be breadwinners.
C) there is a relatively large difference between what the average husband and average wife earn.
D) they know that maintaining care chains helps lower-income families.