5) The long-run aggregate supply curve will shift to the left when A) technology improves. B) new sources of natural resources are discovered. C) population decreases. D) the price level increases. 6) If all other factors are held constant, an increase in imports A) can cause Gross Domestic Product (GDP) to increase or decrease, depending on whether the imports are purchased by consumers or by business firms. B) causes Gross Domestic Product (GDP) to increase. C) causes an increase in exports of the same size. D) causes Gross Domestic Product (GDP) to decrease. 7) Which of the following will cause a leftward shift in the aggregate demand curve? A) a reduction in the money supply B) a reduction in government spending C) an increase in taxes D) all of the above