If an Independent Variable Is Added to a Multiple Regression

Multiple Choice

If an independent variable is added to a multiple regression model, the R² value​

A) ​becomes larger or smaller depending on the statistical significance of the variable.
B) ​becomes larger even if the variable added is not statistically significant.
C) ​might or might not become larger even if the variable added is statistically significant.
D) is not affected by the variable added even if it is statistically significant.