Before WW2, what percentage of American women worked outside of the home? Generally speaking, what social class did they come from?

At the height of the war, women comprised 4 percent of skilled workers.

Explanation:

In 1944, skilled female workers made an average weekly wage of $31.21 while skilled male workers earned $54.65 weekly. From 1940 to 1944, the percentage of women workers employed in factories increased from 20 to 30 percent.

letter d is correct.