Answer: The inflation rate that indicates the change in average prices
Explanation: The option that is probably not included in the options is the inflation rate that indicates the change in average prices, this because the constant present value of the amount invested to know how much we would pay for this good at this time but if we want to know the future value, we must know is the interest rate that could obtain funds, which is why we should have as a return in exchange for investing in this good and finally we could know the time of the values that we want to know, for example if we want to know how much it is the investment in four or five years, this variable helps us to bring the funds that through the interest rate will be worth our good within the indicated period.