D Question 10 2 pts A high and increasing national debt has no effect on productivity gains. O True O False D Question 11 2 pts Because of rent-seeking and powerful unions, the coal industry in America is almost entirely free of government regulations. O True O False D Question 12 2 pts Why was Henry Ford so successful? O He manufactured a quality car and charged less than his competitors. O He was the first person to manufacture an automobile. O He was the first to paint his cars different colors. O He produced luxury cars