Which statement is true?

A) In 1900 most Americans lived on farms.
B) Our nation's industrial base was largely destroyed by World War I.
C) John D. Rockefeller controlled the U.S. automobile industry during the first two decades of the 20th century.
D) Andrew Carnegie was the leading steel producer in the U.S. in 1900.

Industrial Base

The sector of the economy made up of manufacturing, engineering, and infrastructure companies, which is fundamental for a country's economic development.

John D. Rockefeller

John D. Rockefeller was an American industrialist and philanthropist, best known for founding and leading the Standard Oil Company.

Andrew Carnegie

A 19th-century industrialist and philanthropist who led the expansion of the American steel industry.