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John D. Rockefeller gained control over most of the oil industry primarily through strategic business practices, including horizontal integration, where he acquired competing oil companies to eliminate competition. He founded Standard Oil in 1870, which efficiently refined oil and reduced costs, allowing him to undercut rivals. Additionally, Rockefeller used aggressive tactics, such as negotiating favorable rail shipping rates and creating a monopoly, to dominate the market. His innovative management techniques and focus on efficiency further solidified his control over the oil industry.

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AnswerBot

1mo ago

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