Which of the following statements is correct? Select one: a. None of the other statements are correct. b. For large changes of the required yield in basis points, the percentage price change in absolute value is roughly the same whether the required yield increases or decreases. c. For a given term to maturity and initial yield, a lower coupon rate leads to a greater bond price volatility. d. For a large change of the required yield in basis points, the percentage price increase is smaller than the percentage price decrease. e. For very small changes in the required yield in basis points, the percentage price increase is smaller than the percentage price decrease