Jane Austin is investigating the impact of corporate social responsibility on the cost of equity capital. She finds that the CSR and the other explanatory variables are stochastic. At the same time she finds that the estimators of the OLS are still consistent and unbiased, this is due to:

O a. the independent variables and the regressors are uncorrelated O b. the independent variables and the residuals from the regression are uncorrelated O c. the cost of equity capital and the regressors are uncorrelated Od the cost of equity capital and the residuals from the regression ore uncorrelated