How did political debate in america change inthe years after 1774?

Which of these statements best describes the ambiguity in this excerpt

When did the us congress declare war on the confederate states?

What did this mean for dred scott? a. scott was not a citizen of the united states. b. scott was the property of the federal government. c. scott had no right to sue for his freedom in court. d. scott was considered the property of the slaveholding family.