Why is the long-run Phillips curve vertical? ()A. The long-run Phillips curve is vertical because any level of unemployment can occur at the full-employment rate of inflation in the long run. B. The long-run Phillips curve is vertical because the inflation rate is always the same. C. The long-run Phillips curve is vertical because any level of inflation can occur at the full-employment rate of unemployment in the long run. X Q D. The long-run Phillips curve is vertical because the natural rate of unemployment never changes. E. The long-run Phillips curve is vertical because it represents a relationship between two real variables in the long run. X IncorrectX Question 4 0 points What happens if the public does not believe in the Fed's ability to carry out its policy? A. Monetary policy will not work. B. Monetary policy works better. C. Monetary policy takes longer to reach its desired effects. D. Monetary policy works faster. XO E. Fiscal policy will not work