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.
<span>This question can refer to either first or second World Wars. In both cases it happened that 1) the immigrans and refugees went to other countries - such as Latin America, which affected those countries 2) almost all countries were affiliated with one or the other side - sending them ams for example 3) many other countries send their men to fight in those wars, which is why many Canadians and US-Americans fought and died in Europe</span>
To starve aposing countrys of needed money for goods
It is most likely because he believed that they could cause unnecessary conflict... that is just my educated guess
