Consider the regression model Salary= B1+B2WorkExperience+u

Suppose we have another variableRegionwhich captures where the individuals in our data set live, and

Region = 1 if they live in the north

Region = 2 if they live in the south

Region = 3 if they live in the east

Region = 4 if they live in the west

We believe thatRegionaffects theinterceptof the linear relationship betweenSalaryandWorkExperience.

If we wish to account for this in our model, how many additional regressors need to be included in our regression model.

A 3

B 4

C 6

D 7