The answer is B: international travel
The answer to this statement is B
There were 13 original colonies. The way you know that is by counting the stripes on the American Flag. The original 13 colonies were, New Hampshire, New York, Pennsylvania, Massachusetts, Rhode Island, Connecticut, New Jersey, Delaware, Maryland, Virginia, North Carolina, South Carolina and Georgia.
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A key factor that pushed Mexicans to emigrate was not being able to support themselves at home, politics also affected them.