Atticus explains to Jem and Scout that mobs are made up of ordinary people. ... Atticus warns Scout not to touch Walter. He tells her that she should not hold a grudge against Mr. Cunningham: "Mr. Cunningham was part of a mob last night, but he was still a man.
ok the answer is C.
Bc its asking for a description of him to C is talking about him.
It would be D to show the passage of time from childhood to adulthood. Hope this helps