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Answer:
I believe the answer is A) John D. Rockefeller, Standard Oil Company
Explanation:
John D. Rockefeller Sr. - Standard Oil Co.; "sell or parish" tactics; father was snake oil salesman; Made deals with railroad companies to lower shipping costs for his Standard Oil Co.; Standard Oil Co. monopoly controlled almost 90% of U.S. oil.; gave away much of this money later in life for education, religion, and health care; was richest man in the world for period of time.