Research on the Division of Household Labor Among Wives and Husbands

Research on the division of household labor among wives and husbands shows that:

A) since the 1970s and 1980s, wives have increased their housework participation.
B) since the 1970s and 1980s, husbands have decreased their housework participation.
C) among employed couples, wives spend significantly more time in combined housework and child care activities than do their husbands.
D) all of the above