You are presented with the question "what type of nervous system do Cephalopods have?" and the following answer choices: 
- organ
 - automatic
 - nerves
 - sensory
 - three
 - sweating
 - complex
 - brain

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.


 

       complex  