Answer :
i just got done learning about Douglass lol im pretty sure its C but im not 100% sure.
Douglass is implying that witnessing the celebration has shown him that the nation is even crueler than he thought.
Explanation: Fredrick Douglass explained that the hipocrisy of the country to celebrate freedom and rights while still owning slaves (and having him give a speech) makes the country much worse than he imagined.