The paragraph that best develops the man vs. society conflict Marcus faces is "Don't you say a word about him," I said, the anger bubbling over. "You're not fit to talk about him. Yeah, I understand that everything's different now. We used to be a free country. Now we're not."
Explanation:
The character of Marcus deals with several conflicts through the story, one of them is person vs society which happens when he fights against the DHS and argues about how the country is not free anymore and makes comments and fight against the control over the people and it could be seen as a person vs society or government conflict.