What theory does this video presentation supports?

Which of these is true of that temperance movement at the beginning of the 1800’s in america?

How w. e.b. dubois wanted to improve the social and economic situation that existed for african americans during the early 19th century?

Which sentence best explains how steam power changed agriculture in england between 1810 and 1850? a. farmers started using steam-powered machines to spray chemical fertilizers and pesticides. b. livestock farmers began using steam-powered machines to milk cattle and shear sheep. c. steam-powered railways transport and sell agricultural produce far from where it was grown. d. steamships to transport large numbers of people from the united states to english farms.