What would be then consequences for the OLSestimator if heteroscedasticity is present in a regression model but ignored?

What would be then consequences for the OLSestimator if heteroscedasti

1.	What would be then consequences for the OLSestimator if heteroscedasticity is present in a regression model but ignored?
A.	It will be ignored
B.	It will be inconsistent
C.	It will be inefficient
D.	All of a),c), b) will be true.
Answer» D. All of a),c), b) will be true.