Which of the following statement is correct?

Group of answer choices

a. There is a negative relation between changes in the level of interest rates and changes in the price of a bond.

b. The value, or price, of any asset, including bonds, is the future value of its future cash flows.

c. All the answers are correct.

d. The required rate of return, or discount rate, for a bond is the risk-free rate of interest rate equal to the yield of 3-month Treasury bills.

e. Whenever a bond's coupon rate is greater than the market rate of interest on similar bonds (the bond's yield), the bond will sell at par value, and we call such bonds par-value bonds.