Why did women perform jobs they had never done before during World War II?

A: Women filled jobs previously held by the men who went to fight in the war.
B: The women's liberation movement opened new career opportunities.
C: Education grants made it possible for more women to attend colleges.
D: Fewer women were getting married and starting families, making it easier to explore nontraditional career opportunities.

A: Women filled jobs previously held by the men who went to fight in the war.