What Is One Way in Which the Cardiovascular System of a Mammal

Multiple Choice

What is one way in which the cardiovascular system of a mammal is different than that of an arthropod such as an insect?

A) The heart of the mammal pumps blood into arteries, while the insect heart does not.
B) Veins send blood to a mammal's lungs, while insect veins send blood to the heart.
C) A mammal's blood is always contained inside vessels, while an insect's blood sometimes leaves the vessels.
D) A mammal has a heart to pump blood, while an insect does not have a heart.