One aspect of Billy's character is the fact that he has incidents of "time shifting" recurrently. For example, he could see his whole life from beginning to end in one "sweep".
In the chapter when Billy is transported to a camp in Germany, he and the other prisoners are taken to a feast by some English officers who were captured earlier in the war. Billy gets a shot of morphine that sends him time-tripping again. His mind was very likely to feel this sensations when some sudden circumstances appear.
The correct answer should be "the conclusion".
In argumentative essays, it is usually the conclusion which briefly restates what the original and central idea was, and asks for the audience to agree. This plead is called "pathos"
Explanation:
on is used: to mean concerning.
I think it’s A. It says that there is little work to be done, and that could make someone bored.