They must enlist for the U.S. Military.
To meet the American demand for livestock, the Comanche turned to raiding the area around San Antonio. The Spanish government believed that security would come with a larger population, but was unable to attract colonists from Spain or from other New World colonies.
Adam Smith is generally regarded as the founder of modern economics. Adam Smith advocated the capitalist free enterprise system, based on the belief that men are motivated by rational self-interest. His book "Wealth of Nations" became a standard text book for economists throughout the Western world
The best and most correct answer among the choices provided by your question is the second choice which is "railroad tracks."
<span>By 1860 the Midwest and the East were united by a network of railroad tracks.</span>
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