Based on the justification provided by Chief Justice Taney in the Dred Scott ruling, the correct answers would be:
B. Dredd Scott had no right to sue because he was not a citizen.
D. Dredd Scott had no rights to which white men had to respect.
F. Congress could not exclude slavery from the federal territories.
These options reflect the Court's reasoning in the Dred Scott decision regarding citizenship and the legal status of slavery in federal territories.