You are presented with the question "What extends something because of threatening behavior by predators?" and the following answer choices: 
- influenza
 - chickenpox
 - A rodent
 - A primate
 - A treeshrew
 - fur and fat
 - A flying lemur
 - an object

Now knowing that threatening behavior by predators causes a porcupine to extend its quills and porcupines are in the rodent family, choose the best answer.


 

   A rodent      