What 19th-century industrialist founded the Standard Oil Company and became the wealthiest person in modern history through his near-monopoly of the oil industry?

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

John D. Rockefeller's Standard Oil controlled about 90 percent of U.S. oil refining by the 1880s before being broken up by the Supreme Court under antitrust law in 1911.