Which of the following best describes how America’s sources of economic growth have changed over time?

A  Much of America’s growth in the 1800s was driven by its abundant natural resources, but today it is driven much more by America’s success in the technology fields.

B  American has consistently driven its economic growth from the agricultural sector, which remains the largest factor in the country’s economy.

C  America has long been a hub of tech-driven productivity, though that has shifted since the 1980s into more of a manufacturing-driven economy.

D  In the nation’s beginning it was a service-driven economy, though in the twentieth century and especially in the twenty-first, it has relied more on industry to drive growth.