You are presented with the question "most insects have a what?" and the following answer choices: 
- a cuticle
 - storing system
 - city system
 - epidermis and dermis
 - nervous system
 - building system
 - four limbs
 - layers of fat

Now knowing that most invertebrates have a nervous system and insects are the most common invertebrates, choose the best answer.


 

     nervous system    