<span>c.The United States enforced a military quarantine in international waters. </span>
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Answer:
1. to ensure there's food to trade for vital natural resources in other countries.
Explanation:
You can't start an industrial revolution without necessary resources and materials to do so, and in order to get these materials you must make sure there's food to trade for them.
<span>The nation's largest railroad center was found in Chicago. Chicago is considered as the most important center of railroads in North America. Chicago has been the most significant interchange point of commercial transportation between the nation’s great railroads.</span>