The Gauss-Markov Theorem Will Not Hold If _____

Multiple Choice

The Gauss-Markov theorem will not hold if _____.

A) the error term has the same variance given any values of the explanatory variables
B) the error term has an expected value of zero given any values of the independent variables
C) the independent variables have exact linear relationships among them
D) the regression model relies on the method of random sampling for collection of data