Which of the following argued that a long-run trade-off between inflation and unemployment could not exist?

Question

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Friedman and Phelps proposed the natural rate hypothesis, which states that there is no long-run trade-off between inflation and unemployment. They argued that any deviation from the natural rate of unemployment due to expansionary policies would only lead to a temporary decrease in unemployment, after which prices and wages would adjust to the new, higher level of inflation, leaving unemployment back at its natural rate. This idea was influential in shaping macroeconomic policy in the late 20th century.

Which of the Following Argued That a Long-Run Trade-Off Between