Who was responsible for founding the biggest steel corporation in the United States during 1865–1900?

Who was responsible for founding the biggest steel corporation in the United States during 1865–1900?

• A. John D. Rockefeller
• B. J. P. Morgan
• C. Andrew Carnegie
• D. Cornelius Vanderbilt

Answer: (C)

Andrew Carnegie built Carnegie Steel Company, which became the largest steel producer in the United States by the late 19th century. He achieved this through vertical integration—owning iron ore mines, coke ovens, ships, and the mills himself—so costs dropped and production could scale rapidly. Adopting new production methods and expanding capacity across multiple plants let Carnegie outproduce rivals and dominate the industry. By the 1890s his company stood at the top of U.S. steel output. In 1901, Carnegie sold the business to J. P. Morgan and it became part of U.S. Steel, but the rise and leadership of the steel giant during that era belong to Andrew Carnegie. For contrast, Rockefeller led Standard Oil in oil, Morgan was a financier who orchestrated consolidations, and Vanderbilt built railroads and shipping; none founded the steel giant in question.

Andrew Carnegie built Carnegie Steel Company, which became the largest steel producer in the United States by the late 19th century. He achieved this through vertical integration—owning iron ore mines, coke ovens, ships, and the mills himself—so costs dropped and production could scale rapidly. Adopting new production methods and expanding capacity across multiple plants let Carnegie outproduce rivals and dominate the industry. By the 1890s his company stood at the top of U.S. steel output. In 1901, Carnegie sold the business to J. P. Morgan and it became part of U.S. Steel, but the rise and leadership of the steel giant during that era belong to Andrew Carnegie. For contrast, Rockefeller led Standard Oil in oil, Morgan was a financier who orchestrated consolidations, and Vanderbilt built railroads and shipping; none founded the steel giant in question.