15. Using many years' worth of data, you have estimated that the slope of the so-called "securities market line" is about .08. That is, you've found that if a portfolio's systematic risk increases by 1.0, its risk premium should increase by about 8%. Given this information, if the risk-free rate is 5%, what is the current expected return of the so-called "market portfolio?" A. 5% B. 6.5% C. 8% D. 12% E. 13%