Which variable selection technique is the best? O a. Forward selection O b. Backward selection O c. Stepwise O d. All possible regressions O e. None Which one of the following statements is TRUE? O a. Standard linear regression analysis can not indirectly be utilized for analyzing the qualitative response variable. O b. Logistic regression is only valid when we can assume that the independent variables are normally distributed. O c. Discriminant analysis is valid when we can assume that the independent variables are normally distributed. O d. The performance of the logistic regression doesn't depend on the used cutoff