Determine which of the following statements about random forests is/are true?

1-If the number of predictors used at each split is equal to the total number of available predictors, the result is the same as using bagging.

2-When building a specific tree, the same subset of predictor variables is used at each split.

3-Random forests are an improvement over bagging because the trees are decorrelated.

a-None

b-I and II only

c-I and III only

d-II and III only

e-The correct answer is not given by (A), (B), (C), or (D).