Which of the following statements is CORRECT? a. The maturity premiums embedded in the interest rates on U.S. Treasury securities are due primarily to the fact that the probability of default is higher on long-term bonds than on short-term bonds. b. Reinvestment risk is lower, other things held constant, on long-term than on short-term bonds. c. Default risk premiums are generally lower on corporate than on Treasury bonds. d. If the maturity risk premium were zero and interest rates were expected to decrease in the future, then the yield curve for U.S. Treasury W securities would, other things held constant, have an upward slope. e. Liquidity premiums are generally higher on Treasury than corporate bonds