What business tactic did John D. Rockefeller utilize to build Standard Oil?

• A. Vertical integration
• B. Horizontal integration
• C. Interlocking directorates
• D. Diversification

Answer: (B)

John D. Rockefeller used horizontal integration as a primary tactic to build Standard Oil into a dominant player in the oil industry. This strategy involved acquiring or merging with competing oil companies to consolidate market presence and eliminate competition.

By focusing on horizontal integration, Rockefeller was able to control a significant share of the oil refining market. This approach not only allowed Standard Oil to increase efficiency and reduce costs but also to establish the company as a monopoly in the industry. As competitors were bought out or forced into agreements that limited their operational scope, Standard Oil could dictate prices and supply levels, greatly influencing the overall market.

Understanding this tactic helps illustrate the broader trends in American industrialization during the late 19th century, where large corporations often sought to dominate their markets through consolidation and control, shaping the business landscape of the era.