What did john d. rockefeller create in order to monopolize the oil industry?

A trust, is the right answer.

Explanation:

John Davison Rockefeller Sr. was a business magnate and humanitarian from America. He is generally regarded as the wealthiest American of all ages and the wealthiest individual in modern records. In the year 1870, he founded the Standard Oil Company. However, in an attempt to create a monopoly he created a trust.

several states had passed similar laws, but they were limited to intrastate businesses. the sherman antitrust act was based on the constitutional power of congress to regulate interstate commerce.

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the first forms of writing came from them in the form of pictographs around 3100 bc.