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Which robber baron became one of the wealthiest people in the world by creating a trust that controlled most of the oil refineries in the United States? A. John D. Rockefeller B. Cornelius Vanderbilt C. Andrew Carnegie D. John Jacob Astor

User Darma
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cornelius vanderbuilt
User Jeremy Ross
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John D Rockefeller is the answer
User Dan Breslau
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