Other things being equal, as the price level falls exogenously, the aggregate expenditure (AE) function shifts Select one: A. down and the economy will move downward along the AD curve. B. to the left, as does the AD curve. O C. upward and the economy moves downward along the AD curve. O D. upward and the economy moves upward along the AD curve. O E. down and the economy will move upward along the AD curve