Alright well, so I don't get flagged again: Are you supposed to put a comma before "and" in a sentence? Kinda like "Green, yellow, and blue are my favorite colors" or is it supposed to be "Green, yellow and blue are my favorite colors" ?

In tim o'brien's chapter "good form," what does the narrator say is thehappening-truth? oa. that the man he killed was slim and daintyob. that he has never seen a dying person in his lifeoc. that he killed hundreds of men and remembers all their facesod. that he was afraid to look at the faces of the dead