Answer:
Military
African Americans who served in the Civil war were treated with inadequate weapons and medical treatments. Though they were treated differently than white people, they were still treated better in the military.
The correct answer for the question that is being presented above is this one: "a. Massachusetts." In Massachusetts colony was the first abolitionist group formed. It was in <span>1829 when David Walker, a freeman of color originally from the South, published An Appeal to the Colored Citizens of the World in Boston, Massachusetts.</span>
The first mask was made in 7000 BC. It was used primarily for rituals and ceremonies and where typically made of leather or wood. Keep in mind, these where the first masks that our modern generation has been able to find and preserve, masks could have been made earlier than this but detirriorated over time.
However, the first modern surgical masks where made in the early 1960s and replaced a more primitive method of cloth masks.
I hope I have helped! :)