Answer:
I believe it is C
I asked my history teacher about this and she said it is right. Also I believe trade these days does not relate that much to political history.
So sorry if I am wrong
The answer is true. There
was several times where the United States restricted the entry of certain
groups of people into their country. These
was regulate who would enter their country.
Today that is no longer being practiced as restrictions are now being
removed.
"There are assignees, assignors, and obligors."
