I got this wrong, what is the correct answer?

Which of the following best describes the concept of the time value of money? A and B above A. The interest rate is one of the things that determine the difference between the present value and the future value of a given amount of money. B. A dollar promised at some point in the future is worth more than a dollar received today. X C. The trade-off between money now and money later only depends on the inflation rate