20.Which of the following about interest rates is NOT correct? Select one: a. The risk structure of interest rates includes the level of default risk, attached to particular bond issues. b. Investors are likely to demand a liquidity premium to hold long-term securities. c. A negatively sloped yield curve suggests an economy is likely to show significant weakness in the near future. d. Superannuation funds normally prefer to invest a larger proportion of their assets at the short end of yield curve to match the cash flow characteristics of their liabilities. e. For a downward sloping expectations yield curve, the addition of a liquidity premium may result in an observed flat yield curve.