Why doesn't the Phillips curve represent a permanent trade-off between unemployment and inflation in the long run? A. In the long run, aggregate demand sets the price level. B. In the long run, aggregate supply is upward sloping. C. In the long run, aggregate supply is vertical. D. "In the long run, we're all dead."

C. In the long run, aggregate supply is vertical.

Explanation:

Phillips curve: A curve showing the short-run relationship between the unemployment rate and the inflation rate. It says when inflation is high, unemployment tends to be low; when inflation is low, unemployment tends to be high. The short-run Phillips curve exhibits a a trade-off between inflation and unemployment, whereas in the long-run Phillips curve does not, as in the long run it become unrelated. Therefore, ploting both curve on graph, it will show phillips curve is vertical at the natural rate of unemployment.

muslims control the north africa during the period of 1500 up

to 1800. they made a barrier to prevent further european exploration from

entering the africa from the north. however, the dutch ware still able to move

toward the interior with having south africa as one of the routes leading to

the east for trading with asia.