Consider the Multiple Regression Model with Two Regressors X1 and X2,where

Multiple Choice

Consider the multiple regression model with two regressors X1 and X2,where both variables are determinants of the dependent variable.When omitting X2 from the regression,then there will be omitted variable bias for

A) if X1 and X2 are correlated
B) always
C) if X2 is measured in percentages
D) if X2 is a dummy variable