It was "A) W.E.B. Du Bois" who was the first African American to earn a doctorate from Harvard, since he received his PhD from Harvard in 1895.
It is true it’s called the regulator movement
The answer should be B) Bronze age or the second option.
The answer is A. Drove production costs up. It drove production costs down, because they were able to take less time to make the products as well as less materials because 1) standardized parts were invented around the same time, and 2) they didn't have people preparing everything so materials weren't wasted.
