Beginning with a small oil refinery this mans standard oil began to put competitors out of business who was he andrew carnegie j. p. morgan john d. rockefeller

He was John D. Rockefeller.

John D. Rockefeller.

Explanation:

The other options were also among the richest men in the United States but, in the case of Andrew Carnegie, he made his fortune with the Steel industry. While J. P. Morgan was a financier.

John D. Rockefeller started the Standard Oil company in 1870 on Ohio and the corporation grew to be one of the most important monopolies of the entire history until the United States Supreme Court regulated the monopolies on a case against Standard Oil in 1911.

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pennsylvania pennsylvania colony was a proprietary colony founded when william penn was awarded a charter by king charles ii in 1681. he set up the colony as one of religious freedom. the government included a representative legislature with popularly elected officials. all taxpaying freemen could vote.

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the installment plan of the 1920s, an arrangement that allowed people to buy what they wanted with a small down payment and pay off the rest in monthly installments, provided americans a way to own what they did not have the money to buy.