Final answer:
Andrew Carnegie created a monopoly in the steel business.
Step-by-step explanation:
Andrew Carnegie created a monopoly in the steel business. He was a prominent figure in the steel industry during the late 19th century and early 20th century. Carnegie founded the Carnegie Steel Company, which eventually became U.S. Steel, and he controlled a significant portion of the steel production in the United States, giving him a monopoly in the industry.
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