You are presented with the question "Which animals have a circulatory system?" and the following answer choices: 
- insects
 - mammals
 - fur seals
 - sharks
 - cows
 - squids
 - a fish
 - chickens

Now knowing that mollusks have a circulatory system with one or two hearts that pump blood and interestingly, a squid is also a mollusk, choose the best answer.


 

      squids   