Answer:
The quote is about how when we are young, we are told to savour our youth because it's fleeting. When you're young though, it can feel like forever and it's harder to see how fleeting youth truly is. I believe this was included at the start of the novel because the book later follows Connor, who is only a boy.
Fire prometheus bestow on humankind
Because they would spy, smuggled, and sabotaged under the Nazis' noses
Answer is A. The main purpose of a summary is to relay the main events/details of the story. If you are missing any needed info, the summary is incomplete