If the economy is in equilibrium at the natural rate of unemployment and the Fed pursues an expansionary monetary policy, which of the following will the monetarists predict?

a$.$ The economy will move to a temporary equilibrium at a lower level of unemployment and a higher level of GDP$.$

b$.$ The economy will move to a long$-$run equilibrium at a lower level of unemployment and a higher level of GDP$.$

c$.$ The economy will move to a long$-$run equilibrium at the same level of unemployment and the same level of GDP$,$ but a higher price level.

d$.$ The equilibrium in the economy will not change.