Why Are There a Lot More Supermoms Than Superdads and Fewer

Why are there a lot more Supermoms than Superdads and fewer female Breadwinners than male Breadwinners?

A) Men who take care of children and do housework are praised.
B) Men who like cooking, cleaning, and raising children do this less well than women.
C) Men graduate from college in considerably higher numbers, thus setting them up to be higher wage earners.
D) Women are still held disproportionately responsible for housework and childcare.