【单选题】According to real business proponents, in an increase in productivity ( ) the demand for loanable funds, ( ) the demand for labor, and ( ) the supply of labor. The real interest rate will ( ).
A.
increases; increases; there is no change in; fall
B.
increases; increases; there is no change in; rise
C.
decreases; decreases; decreases; fall
D.
increases; increases; increases; rise