Answer:
D) 1900s
Step-by-step explanation:
AS you can see in the graphic the number of women that were employed in manufacturing was 503k in 1890 and it increased 524k by 1990, this is the biggest growth in the graphics that you can find, this can be for several reasons, the main one being the fact that many immigrant women needed a job to help support their families, and as they arrived to cities, they had to enter the manufacturing world.