D Question 12 Consider two classification models A and B to classify customers into responders vs. non-responders. If A has a higher accuracy rate than B, we can safely say that A is performing better than B to save money for the company. O True O False Question 13 Which of the following code drops the first three column? Odfl. -c(1.2.3)] O df. -1.-2.-3)] O dfl-c(1.2.3)] O df[-c(1,2,3).] Question 14 Which of the following statement is correct? O glm) can only be used to train logistic regression models. O We only need to import a library once in one R file using library() function and then all R files can use it. O ggplot2 package uses grammar of graphics. O data.frame() can only take numerical values. D