You are presented with the question "What can have a water vascular system with tube feet?" and the following answer choices: 
- ducks
 - peachleaf willow
 - cats
 - orchids
 - Most plants
 - horses
 - animals
 - deuterostomes

Now knowing that echinoderms have a unique water vascular system with tube feet and all echinoderms are deuterostomes , choose the best answer.


 

        deuterostomes 