As the IS Curve Becomes Flatter, We Know That

As the IS curve becomes flatter, we know that:

A) a given change in the money supply will cause a smaller change in unemployment.
B) a given change in the money supply will cause a larger change in unemployment.
C) a given change in the money supply will cause the same change in unemployment.
D) the effectiveness of monetary policy depends on fiscal policy.
E) monetary policy becomes less effective.