You are presented with the question "These belong to the class of creature that were the first true tetrapods:" and the following answer choices: 
- millipede
 - crabs
 - four limbs
 - bullfrogs
 - gastropod
 - a fish
 - warm-blooded
 - insects

Now knowing that amphibians are the first true tetrapods, or vertebrates with four limbs and bullfrogs eat other amphibians, choose the best answer.


 

    bullfrogs     