The Panama Canal because it makes the most money and is the most important out of all the four.
On May 26, 1924, the U.S. government enacted the eugenics-inspired Immigration Act of 1924, which completely prohibited immigration from Asia. The law reflected the desire of Americans to isolate themselves from the world after fighting World War I in Europe, which exacerbated growing fears of the spread of communist ideas. It also reflected the pervasiveness of racial discrimination in American society at the time.
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Explanation:
the first question the answer is c and the difference of a and b is a is by a lake and b is by a creek the rest i don't know sorry
