The U. S. experience of strong economic growth, full employment, and price stability in the late 1990s and early 2000s can be explained by a .a. leftward shift of aggregate demand and a rightward shift of aggregate supply. b. rightward shift of aggregate demand and a leftward shift of aggregate supply. c. rightward shift of aggregate demand and a rightward shift of aggregate supply. d. leftward shift of aggregate demand and a leftward shift of aggregate supply.