Answer:
A) Principal will be repaid earlier than anticipated and will need to be reinvested at lower rates, generating a lower level of income
Explanation:
Because of the lower interest rates, the investor will get his principal back faster. This can now be invested back at the new lower rate.
The loan duration will also reduce in this instance.
Getting quick funds to pay off the old higher interest mortgage will be a smart move. There will now be an investment in the lower interest mortgage.