Which of the following is the correct definition for veins? A. Any of the muscular elastic tubes that form a branching system and that carry blood away from the heart to the cells, tissues, and organ

Which of the following is the correct definition for veins?

A. Any of the muscular elastic tubes that form a branching system and that carry blood away from the heart to the cells, tissues, and organs of the body.

B. Blood vessels which carry blood from the capillaries toward the heart.

C. Tiny blood vessels that distribute oxygen-rich blood to the body.

D. Consisting of the heart, blood vessels, and blood.