Which of the following factors played the largest role in increasing the
settlement of the Great Plains?
(A) Construction of railroads
(B) Removal of the Great Plains Indians
(C) Increase in foreign demand for agricultural goods
(D) Increase in price of agricultural goods
(E) Extended period of economic infl ation
It was mainly the "(A) Construction of railroads" that played the largest role in increasing the settlement of the Great Plains, since this radically reduced the travel time it took to reach the Plains from the East Coast.