Which of the following statements is correct? a. If you need a specific amount of money at a specific future date, you could invest in a number of different kinds of bonds, but the one type of bond that you should avoid is a zero coupon bond, because such bonds do not pay any interest. b. If you need a specific amount of money at a specific future date, you should be concerned about price risk, but you do not need to be concerned about reinvestment risk. c. Other things held constant, a 10-year bond has more reinvestment risk than a 30-year bond.