Answer:
Nearly 20,000 women worked more directly for the Union war effort. Working-class white women and free and enslaved African-American women worked as laundresses, cooks and “matrons,” and some 3,000 middle-class white women worked as nurses.Feb 5, 2010
Explanation:
A. new trade and economic opportunities
I want to say entrepreneurship, but there's also free economy enterprise, so... I'm gonna go with entrepreneurship.