The Primary Factor That Caused Some Economists to Lose Their

Multiple Choice

The primary factor that caused some economists to lose their faith in the Keynesian approach to macroeconomic policy was

A) the high levels of unemployment that occurred during the Great Depression.
B) the presence of both high unemployment and high inflation during the 1970s.
C) theoretical proof that Keynes's ideas were invalid.
D) evidence that Keynes's ideas were useful during economic recessions, but not during economic booms.