Why Should Augmented Dickey-Fuller Tests Always Be Used When Performing $\rho$

Multiple Choice

Why should augmented Dickey-Fuller tests always be used when performing econometric analysis?

A) the augmented tests allow for more degrees of freedom
B) so we can test hypotheses using a t-distribution
C) since no assumptions about the sign of $\rho$ are needed to perform a one-tailed test
D) to confirm that error terms are not autocorrelated