Question

how did john d. rockefeller vertically integrate his monopoly in 1882? he purchased coal plants around the country to add to his business. he created a trust that controlled ninety percent of the nations oil refineries. he created a trust that controlled oil wells, refineries, and distribution networks. he purchased iron mines around the country to add to his business.

Explanation:

Vertical integration involves controlling different stages of the production - to - distribution process. John D. Rockefeller's Standard Oil vertically integrated by creating a trust that controlled oil wells (production), refineries (processing), and distribution networks. Purchasing coal plants or iron mines is not related to vertical integration in the oil business. Creating a trust that only controlled refineries is horizontal integration in the refining part of the oil industry.

Answer:

He created a trust that controlled oil wells, refineries, and distribution networks.