During the 1960s, many Keynesian economists felt that by studying the Phillips curve, Part 2 A. policymakers could fine-tune the economy by selecting policies that would produce the exact mix of unemployment and inflation that suited current government objectives. B. the President and Congress did not need to attempt to balance the budget. C. policymakers could eliminate even frictional unemployment in the economy. D. policymakers could dispense with the Federal Reserve's open-market operations