Answer:
The correct answer is option c.
Step-by-step explanation:
We know that, according to the Philips curve, there is an inverse relationship between the inflation rate and unemployment. It is indicated by the downward sloping Philips curve.
In the given equation:
πt - πt-1 = 20 - 2ut
20 indicates the natural rate of unemployment. We are aware that when the actual unemployment is lower than the natural rate of unemployment, the actual inflation rate tends to be higher than the expected rate.