What tactic did Rockefeller use to undermine Carnegie's business?

• A. Negotiated a merger
• B. Started a new company
• C. Purchased a large iron ore mine
• D. Invited Carnegie to invest in his company

Answer: (C)

Rockefeller's strategy to undermine Carnegie's steel business involved purchasing a large iron ore mine. By acquiring this resource, he aimed to control essential raw materials that were critical for steel production. This move provided Rockefeller with significant leverage over Carnegie, as it enabled him to increase his influence in the steel market and potentially drive up costs for his competitor. Controlling the supply of raw materials allowed him to reduce production costs for his own business, while straining Carnegie's operations.

The other options do not accurately represent the methods employed by Rockefeller against Carnegie. Negotiating a merger would imply collaboration rather than competition. Starting a new company does not directly undermine an existing competitor's supply chain or market position. Inviting Carnegie to invest in his company suggests an alliance that contradicts the competitive nature of their relationship. Thus, acquiring the iron ore mine stands out as a strategic move specifically designed to weaken Carnegie’s business operations.