Consider the Regression Equation: R_i R_f = G₀ + G₁b_i

Consider the regression equation: r_i r_f = g₀ + g₁b_i + e_it
where:
R_i r_f = the average difference between the monthly return on stock i and the monthly risk free rate
B_i = the beta of stock i
This regression equation is used to estimate

A) the benchmark error.
B) the security market line.
C) the capital market line.
D) the benchmark error and the security market line.
E) the benchmark error, the security market line, and the capital market line.