Which of the following statements is correct? a. The yield curve is the graphical depiction of the relationship between the yleld on bonds of the same credit quality but different maturities. b. The yield curve is the graphical depiction of the relationship between the yield on bonds of the same maturity but different credit qualities. c. The benchmark spread on a bond is not affected by the maturity of that bond but is affected by the Issuer's percelved creditworthiness. d. None of the other answers given. e. The benchmark spread on a bond is not affected by the expected liquidity of that bond but is affected by its maturity