Which of the following investment options is most valuable? Assume a positive interest rate, and that all options have the same risk. a. receiving $10,000 today and $10,000 next year b. receiving 10 payments of $2,000 per year with the first payment made today c. receiving $4,000 per year for five years beginning next year d. receiving $20,000 today e. All of them have the same value

*Please explain!