An economist knows that error term of the model Y - B1 + 8212 + e is heteroskedastic. He intends to evaluate this linear model using a simple LS regression. Which action should he take? Select one: O a. Run a LS regression but make sure to suppress the intercept. O b. Run a LS regression using the robust error correction, also known as White-robust errors. c. Run the standard LS regression as the coefficient estimates and their respective inference are unbiased. d. It is impossible to obtain unbiased coefficient estimates using the standard LS regression