If you are talking about the Second Industrial Revolution, then the person who had a monopoly in the steel industry was Andrew Carnegie.
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It was a form of American foreign policy to further it's aims in Latin America and east Asia through use of its economic power by guaranteeing loans made to foreign countries
I think B is the appropriate answer among the others. Hope this helps :)
Answer:
he Battles of Lexington and Concord, fought on April 19, 1775, were the first military clashes of the American Revolutionary War. The Massachusetts militia routed the British Army forces and were soon joined by militias from Connecticut, New Hampshire, and Rhode Island
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