which of the following would you need to use in order to determine the present value of an

which of the following would you need to use in order to determine the present value of an annuity> A. lump sum to be received in 5 years time b. the amount of equal cash flow payment to be received each year for the next 5 years c. cash flows that increase by $1,000 each year for 5 years d. cash flows that are not known today