how did john d. rockefeller vertically integrate his monopoly in 1882? he created a trust that controlled…

how did john d. rockefeller vertically integrate his monopoly in 1882? he created a trust that controlled oil wells, refineries, and distribution networks. he created a trust that controlled ninety percent of the nations oil refineries. he purchased coal plants around the country to add to his business. he purchased iron mines around the country to add to his business.
Answer
Brief Explanations:
Vertical integration involves controlling different stages of the production - distribution process. Rockefeller's trust controlled oil wells (production), refineries (processing), and distribution networks, which is vertical integration. Controlling just refineries is more horizontal in nature related to market share in one stage. Purchasing coal plants or iron mines is unrelated to the oil - production process for vertical integration.
Answer:
He created a trust that controlled oil wells, refineries, and distribution networks.