Of all parts of aggregate demand, investment spending is the A. least affected by interest rates and expectations. B. largest. C. part that is not postponable. D. most volatile, unpredictable part.In the short run, the aggregate quantity supplied of real GDP Part 2 A. decreases if the price level risesdecreases if the price level rises. B. increases if the price level fallsincreases if the price level falls. C. decreases if the price level fallsdecreases if the price level falls. D. All of the choices above are correct