Why should the risk free rate matter when estimating the expected return for an equity investor? Select one: 0 a. it is a benchmark for returns, below which investors will not swap out of riskless assets b.it has a high r squared (explanatory power) over future expected returns of securities C. it is one component of the Security Market Line d. it is essential for calculating beta of individual securities, and hence, expected returns e. it helps determine which projects offer attractive returns prospects