Answer:
we trade oil and we trade money in for stuff
Explanation:
It started with the Chinese Exclusion Act of 1882, but 10 years later it then came to the US opening Ellis Island in which immigrates had spent time before being able to actually enter the US.
The U.S. Bureau of Refugees, Freedman's and Abandoned Lands, popularly known as the Freedmen's Bureau, was established in 1865 by Congress to help former black slaves and poor whites in the South in the aftermath of the U.S. Civil War ,1861-65.
