I think its was because of Lincoln's rejection of the Final Compromise.
(Extension of Slavery)
The correct answer should be political speech. Although free speech exists and is established under the first amendment, the court came to the verdict that advocating the unlawful removal of a government in violent means in still prohibited because it calls for violence and something that is not legitimate, and is therefore banned.
B. Planters from Barbados and their slaves.
I’m pretty sure the answer would be wells