Question

how did john d. rockefeller horizontally integrate his monopoly in 1882? he purchased iron mines around the country to add to his business. 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.

Explanation:

Horizontal integration involves a company acquiring or merging with competitors in the same industry. Rockefeller's Standard Oil used trusts to gain control over a large portion of the oil - refining sector. Purchasing iron mines or coal plants would be vertical integration (controlling different stages of production). Controlling oil wells, refineries, and distribution networks is also more of a vertical integration concept. But controlling a large percentage (ninety percent) of the nation's oil refineries (which are competitors in the same stage of production - refining) is horizontal integration.

Answer:

He created a trust that controlled ninety percent of the nation's oil refineries.