Answer :
The correct answer from those provided should be D. a new system of producing goods by using machines rather than manual labor. It was mostly a period of time in the 19th century when industry started developing rapidly and people started using machines more and more in manufacturing goods, which led to higher quality products, and all made in higher quantities. Things like cars and clothes became easy to make.
d is the correct anwser it was on a quiz a week or so ago d is right