A. The excess supply of saving will push down the real interest rate, which will decrease the quantity demanded of investment and increase the quantity supplied of saving. B. The excess demand for investment will push up the real interest rate, which will decrease the quantity demanded of investment and increase the quantity supplied of saving. C. The excess supply of saving will push up the real interest rate, which will decrease the quantity demanded of investment and increase the quantity supplied of saving. D. The excess demand for investment will push up the real interest rate, which will increase the quantity demanded of investment and decrease the quantity supplied of saving. E. The excess demand for investment will push down the real interest rate, which will decrease the quantity demanded of investment and increase the quantity supplied of saving