"On December 1st, an officer of REX Corporation wishes to sell stock under Rule 144. REX has 15,000,000 shares outstanding. The previous weeks' trading volumes are:"

Which of the statements best describes why the aggregate demand curve is downward sloping? an increase in the aggregate price level causes consumer and investment spending to fall, because consumer purchasing power decreases and money demand increases. as the aggregate price level increases, consumer expectations about the future change. as the aggregate price level decreases, the stock of existing physical capital increases. as a good's price increases, holding all else constant, the good's quantity demanded decreases.