Which of the following statements is most correct? Seleccione una: O a. The real risk-free rate of interest is the rate that is shown in the Wall Street Journal for the long term federal securities. O b. The real risk-free rate of interest is the rate that is shown in the Wall Street Journal for the short term federal securities. O c. The real risk-free rate of interest is a rate that has been adjusted to remove the effects of inflation for some period, while the nominal risk-free rate of interest reflects the rate of inflation for some period. O d. The real risk-free rate of interest is the rate that is shown in the Wall Street Journal for the long term federal securities, plus a forecast of the rate of inflation for the period of the securities