Answer:
He created a trust that controlled oil wells, refineries, and distribution networks.
Explanation:
Vertical integration is the term for the strategy of controlling supply change and distribution. They include the previously existing companies in their chain – ones that operate with production, supply, and distribution.
This strategy was used by John D. Rockefeller in 1882. He created the Standard Oil trust company that included other companies focusing on management, transportation, and distribution of oil and oil wells. It became a very rich business that owned a monopoly over the supply and distribution of the oil, wells, and pipelines.
