Which statement is the most accurate?

a) Nearly every major economic innovation originated abroad and was then applied in the United States.

b) The United States provides a poor environment for innovation.

c) Freedom of thought, a risk-taking culture, and a noncorrupt bureaucracy have made the United States very hospitable to innovation.

d) Although the United States was once the world’s leading innovator, since we lost most of our manufacturing base, we are no longer a major innovator.