If the real interest rate rises, then the

a quantity of saving increases and there is a movement up along the supply of loanable funds curve.

b supply of saving increases and the supply of loanable funds curve shifts rightward.

c supply of saving decreases and the supply of loanable funds curve shifts leftward.

d quantity of saving decreases and there is a movement down along the supply of loanable funds curve.

e demand for investment decreases and the demand for loanable funds curve shifts leftward.