In What Order Did Women Historically Enter the Workplace

In what order did women historically enter the workplace?

A) first women under 20 years old, then women between 20 and 40 years old, then women over 40 years old
B) first single women, then married women without children, and eventually most married women with young children
C) first married women who had no siblings, then women with one sibling, then women with two or more siblings
D) first women in the northeastern United States, then women in the southern United States, then women in the midwestern United States