Answer:
I II & III - All of the above.
Step-by-step explanation:
Real interest rate is an interest rate that shows actual cost of funds to a borrower having taken into consideration the effects of inflation while also reflecting actual gain to the lender. It shows how purchasing power has value on interest paid on a loan.
With regards to the above, determinants of real interest rates are; the supply of savings by household and business firms, the demand for investment funds and the government's net supply/and or demand for funds.