Do i write, "to cue the reader in to the idea" or "to cue the reader into the idea"?

Choose the sentence that is not logically connected in the paragraph. (1) doctor henderson was a kind and gentle man. (2) his patients loved and respected him. his death made many of them sad. (3) as a young man, he decided to become a doctor and pursue a life of healing and comforting. (4) his work will long be remembered by the citizens of battle creek, michigan.