If X2 is a binary predictor (i.e. it is a dummy variable) in Y = β0 + β1X1 + β2X2, then which statement is most nearly correct?
A. X2 would be a significant predictor if β2 = 423.72
B. X2 will shift the estimated value of Y either by 0 units or by β2 units
C. X2 = 0, X2 = 1, X2 = 2 would be appropriate if three categories exist
D.X2 = 1 should represent the most desirable condition