Which of the following is a constraint to discretion ry fiscal policy? O Discretionary fiscal policy that is expansionary can only affect frictional unemployment by reducing cyclical unemployment. O Discretionary fiscal policy will only affect aggregate supply leaving aggregate demand unchanged. O Discretionary fiscal policy has lags in its effectiveness with time needed to recognize the problem and to carry out policy solutions. Discretionary fiscal policy can only be used to address unemployment, with no ability to affect the price level. Discretionary fiscal policy that is expansionary tends to reduce interest rates and overstimulate investment