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Which of the following is true of heteroskedasticity? A: Heteroskedasticty causes inconsistency in the OLS estimators. B: The OLS estimators are not the best linear

Which of the following is true of heteroskedasticity?

A: Heteroskedasticty causes inconsistency in the OLS estimators.

B: The OLS estimators are not the best linear unbiased estimators if heteroskedasticity is present.

C: It is not possible to obtain F statistics that are robust to heteroskedasticity of an unknown form.

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