Both authors selected genres that convey a genuine account of the Holocaust from personal experience.
The writer can effectively bolster the conclusion by summarizing the main points.
I'm unsure which book this pertains to, whether it's Adventures of Huckleberry Finn or Adventures of Tom Sawyer, but I think the answer is A. The latter story takes place before the first, and the initial one focuses on aiding Jim's escape.
A singular subject connected by or/nor necessitates a singular verb.