Consider the regression model

y=0+1x1+2x2+u

Suppose this is estimated by Feasible Weighted Least Squares (FWLS) assuming a conditional variance function Varux=2h(x). Which of the following statements is correct?

A) The function h(x) does not need to be estimated as part of the procedure

B) If the assumption about the conditional variance of the error term is incorrect, then FWLS is still consistent.

C) FWLS is the best linear unbiased estimator when there is heteroscedasticity.

D) None of the above answers are correct