The correct answer in this case is "we"
Us is also correct but in that case the sentence would not be an elliptical one. If you use "we" then the sentence is both correct and elliptical which fits the description of the question.
Hi,
I would say choice A, the reason the author is writing.
~Elisabeth
Answer:
Multicollinearity occurs when independent variables in a regression model are correlated. This correlation is a problem because independent variables should be independent.
Explanation: