机经中也出现好多遍了，但好像意见不统一，查了教材也没查到

categorize variables, 4 variable levels VS 8 variable levels, (choose two)

A. 4 can have less dimensions
B. 8 can lead to collinearity
C. 4 can avoid overfitting
D. don't remember

好像就是前三个中，不知道该选哪两个。有哪位同学有查到吗？

谢谢！