We say that today the American economic system is a "mixed" system--basically a market system but with some necessary elements of government control and protection. At what point in American history was there a completely "free" market system? a. during the colonial period b. in the years immediately following the Revolution, when the Continental Congress provided only a very weak form of government c. in the thirty years following the Civil War, when American entrepreneurship and enterprise led to the most dynamic economic growth yet seen in the nation's history d. never