Question: In a regression model, after feature selection, you notice a significant increase in the variance inflation factor ( VIF ) . What is the most

In a regression model, after feature selection, you notice a significant increase in the variance inflation factor (VIF). What is the most likely reason for this?
Overfitting due to too many features.
Underfitting due to feature removal.
Insignificant change in model performance.
Introduction of multicollinearity.

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