Answer:
Monopsony power and social benefit can be ignored
Answer:
B. Europe
Explanation:
On the graph, you can see that after 1870-1919, Europe's immigration basically goes downhill. In that case, Europe received a very major decline in immigration, making it the right answer. Apologies if I'm wrong.
Farming affected the native Americans greatly, because before the native Americans were introduced to farming they had little choices for food/trade