By the late 1800s, the United States was the worlds leading industrial nation. By 1914, the nations gross national product - the total value of all goods and services that a country produces- was eight trimes greater than it had been in 1865 when the Civil War came to an end.Which is NOT a supporting detail of this paragraph?
A. The value of goods and services produced in the US expanded many times. B. The United States became the world s leading industrial nation. C. The GNP growth between 1865 and 1914 was 800%. D. Industry has always been important to the US economy.