A. the japanese attack on pearl harbor
The answer is B...........
Some labor unions opposed immigration because their members believed immigrants would take jobs away from native-born americans. ... The 3 reasons are because the immigrants put them out of jobs, were invading the country, and they were racists.
Probably rivers and water sources, because you need water to farm, and the water by rivers is rich and the soil is good. So yea the rivers and other water sources would be the main thing.
To escape discrimination. To escape losing their freedom again. To secure safety and freedom
