You are presented with the question "What has a complex nervous system?" and the following answer choices: 
- insects
 - Airplanes
 - Rocks
 - elephants
 - humans
 - animals
 - h2o
 - Cephalopods

Now knowing that most invertebrates have a more complex nervous system and cephalopods have the most advanced nervous systems of all invertebrates, choose the best answer.


 

        Cephalopods 