If the Residuals of a Regression on a Large Sample

Multiple Choice

If the residuals of a regression on a large sample are found to be heteroscedastic which of the following might be a likely consequence?
(I) The coefficient estimates are biased
(ii) The standard error estimates for the slope coefficients may be too small
(iii) Statistical inferences may be wrong

A) (i) only
B) (ii) and (iii) only
C) (i) , (ii) and (iii)
D) (i) and (ii) only