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4. Traditional gender roles were challenged during the war.

Explanation:

When the men had to go over seas and fight, the country stilled needed the materials that the men in the factories were making. Because most of the men capable of working in these factories left, the women had to take over to produce the goods for the country and for the war efforts. Society then saw that women could be used for more that popping out kids and cleaning the house, so the traditional 'housewife' ideal was gone forever. Not everybody liked that idea, and many women to this day love the housewife ideal, but most women were ready to start something new and actually have a place in the world of labor.

bujías y una hora antes y no me parece muy difícil