Topic: Feature Engineering

A limitation of Forward or Backward $($i$.$e$.$ stepwise$)$ Elimination is that $($Select ANY correct answer$)$

A$.$

they do not work on polynominal attributes.

B$.$

they be computationally expensive algorithms when there are many attributes.

C$.$

they can get stuck in a local optimum and end the optimization prematurely.

D$.$

they often fail to find any features worth using.