1-Which would shift the short run aggregate supply curve to the left?

A.an unemployment level greater than the natural rate of unemployment

B.a lower price level

C.an expectation of inflation

2-Which would NOT shift the long run aggregate supply curve outwards?

A.immigration

B.an outward shift in the production possibilities curve

C.a higher price level

D.better management of natural resources

3-In the aggregate supply and demand model, in long run equilibrium

A.potential real GDP equals the full employment level of output.

B.the unemployment rate equals the natural rate of unemployment.

C.the inflation rate is zero.

D.All of these.