Answer: B. Transport blood through the body to supply cells with oxygen and nutrients.
Step-by-step explanation:
Cardiovascular system is a system which include heart, and blood vessels which transport the blood to all the parts of the body. The blood supplies the oxygen and other nutrients to all the parts of the body necessary for the survival of each cell of the body and for the overall body. The heart pumps out oxygenated blood to the body and receives the deoxygenated blood from all the parts of the body for purification.