Government purchases of goods and services while changes in taxes and transfer payments A. are exercises of fiscal policy; are exercises of monetary policy B. are exercises of monetary policy; are exercises of fiscal policy O C. influence aggregate demand directly; influence aggregate demand indirectly O D. influence aggregate demand indirectly; influence aggregate demand directlyIn February 2012, the Bureau of Labor Statistics calculated the unemployment rate to be 8.3%. If frictional unemployment was 3.1% and structural unemployment was 3.2%, then the natural rate of unemployment was: A. 4.5%. B. 2.0%. O C. 1%. O D. 6.3%