Industrialization was the factor that contributed to the economic growth of the United states in the period from 1865 to 1920 and it aroused the most opposition. With industrialization came the urge for people to come to the cities for getting work. The people that came to work had to live in a very poor and unhealthy condition.
C. China, India, and the United States is the correct answer I believe.
Eli Whitney was the one with the cotton
James Watt was the one with the coal and water
And Jethro Tull Was the reduced number of workers to plant crops.
I believe the answer is a lieutenant governor