Which of the following from "The Tell-Tale Heart" is an effective use of juxtaposition?

1. I undid the lantern cautiously-oh, so cautiously
   
   
2. … the shutters were close fastened, through fear of robbers...
   
   
3. I turned the latch of his door and opened it --oh so gently!
   
   
4. The sound "grew louder--louder--louder! And still the men chatted pleasantly,