what historical event led to the United States transition from a free market economic system to a mixed market system?

The Market Revolution (1793–1909) in the United States was a drastic change in the manual-labor system originating in the South (and soon moving to the North) and later spreading to the entire world. Traditional commerce was made obsolete by improvements in transportation, communication, and industry.

answer; the cats meowing will temporarily increase, but then it will decrease;