The narrator is the character or person telling the story
Because when he lost all his possessions he had found his creativity
He lied to him because he knew that the Cyclops would call his brothers, when blinded, so he said his name was "nobody" so as to have the Cyclops yell out: "Nobody has blinded me". This in turn caused his brothers to not react at all, because they thought that gods had blinded his brother, therefore he is yelling that Nobody blinded him. Let's say then that the third sentence is the only one that can fit the story.
