Which one is correct?

Hi, which is correct?

In the old days, people used to have a traditional division of labour in the family...........

A) so it was very clear who was expected to do what on a daily basis

B) if the recession was adding to the number of fathers staying home

C) which was a small number compared to five million stay-at-home mums

D) why they were partners not only in marriage but in managing the household

E) today men are more involved than their fathers were in parenting their children

Is E correct?