Assume That You Have Used the OLS Estimator in the Cointegrating

Assume that you have used the OLS estimator in the cointegrating regression and test the residual for a unit root using an ADF test.The resulting ADF test statistic has a

A) normal distribution in large samples.
B) non-normal distribution which require ADF critical values for inference.
C) non-normal distribution which require EG-ADF critical values for inference.
D) normal distribution when HAC standard errors are used.