How did women’s roles in the workforce change during world war i?
a. women entered the industrial workforce for the first time.
b. women replaced men as workers in factories.
c. women fought in the war alongside men.
d. women became the primary earners at home.

The right answer is B.Women replaced men as workers in factories.

Before WWI men and women were said to inhabit 'separate spheres' meaning that they had different personality traits and different roles in society. Women had a stereotypical role in society. Their place was the home, and it was a common opinion that their personality was suited to nursing children and keeping a clean and well-fed household. The role of women in society changed dramatically in WWI. Women were needed to do jobs that previously would not have been given the opportunity to do. Their pay increased and generally they experienced more freedom. Women worked heavy machinery, on farms, civil service, and factories.

yes i think there would be volunteers

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.