Final answer:
Justice Taney's statement that Black people are not citizens to justify that they are not citizens exemplifies circular reasoning and is the fallacy in the passage.
Step-by-step explanation:
The statement that best describes the fallacy in the passage from the opinion of the court in Dred Scott v. Sandford, written by Justice Taney, is that Justice Taney uses the argument that Black people are not citizens to prove that they are not citizens. This reasoning is circular and presents a logical fallacy, as it assumes what it is trying to prove without providing independent evidence or rationale. Justice Taney determined that Dred Scott, as a black person, could not be considered a citizen and therefore had no standing to sue in federal court for his freedom. This decision was based on a narrow interpretation of the Constitution, reflecting the prevailing racial prejudices of the time and denying basic human rights to African Americans.