Answer:
c. A new technology such as the Internet has just been introduced, and it increases investment opportunities.
Step-by-step explanation:
Nominal interest rate is the sum of real interest rate and expected inflation rate.
If expected inflation rate falls, the nominal interest rate also falls.
During a recession, people are more unwilling to borrow funds ,this pushes interest rate down.
If investment opportunities increases, the demand for funds would increase and nominal interest rate would increase too.
I hope my answer helps you