A price index:A. measures the cost of purchasing a market basket of output across different years. B.always includes a base year, measures the cost of purchasing a market basket of output across different years, and is normalized to 100 for the base year. C.is equal to 100 for the base year. D.always requires to consider a base year.

Answer the questions about keynesian theory, market economics, and government policy. keynes believed that there were "sticky" wages and that recessions are caused by increases in prices. decreases in supply. decreases in aggregate demand (ad). increases in unemployment. keynes believed the government should increase ad through increased government spending, but not tax cuts. control wages to increase employment because of sticky wages. increase employment through tax cuts only. increase as through tax cuts. increase ad through either increased government spending or tax cuts. intervene when individual markets fail by controlling prices and production.