Lady Macbeth takes her husband to be scared because he didn't want to kill the king
The answer should be C since foreshadowing is a warning regarding a future event.
He was stabbed in the eye with a wooden stake and was drunk - odysseus said to him his name was nobody so polyphemus shouted 'Nobody is killing me!'
or effectively "nobody is killing me by force or treachery" like you said
This can be titled as either "word choice" or "diction". Both of these refer to how the author uses specific words, language, or slang to set the mood of their writing piece.