An Independent Variable Can Be Included in a Regression Model:​

An independent variable can be included in a regression model:​

A) ​when it affects y and is uncorrelated with all of the independent variables of interest.
B) ​when it does not affect y and is uncorrelated with all of the independent variables of interest.
C) ​when it affects y and is correlated with all of the independent variables of interest.
D) ​when it does not affect y and is correlated with all of the independent variables of interest.