Answer:
D. monthly interest compounding
Explanation:
Monthly compounded rate is highly effective rate from all other available rates. because monthly interest income received are also compounded with principal. Number of compounding in monthly rate is more than all others.
Suppose:
Amount of Investment = $100
Annual Interest = 12%
Annual amount of Interest Income = $100 x 12% = $12
Semi-annual amount of Interest Income = $100 x (1+(12%/2))^2 = $112.36
Quarterly amount of Interest Income = $100 x (1+(12%/4))^4 = $112.55
Monthly amount of Interest Income = $100 x (1+(12%/12))^12 = $112.68
Hence proved that Monthly interest compounding is most effective rate.
