Question

what is the main vein that returns blood back to the heart from the lower body? aorta inferior vena cava superior vena cava cardiac vein

Explanation:

The inferior vena cava is the large - diameter vein that carries deoxygenated blood from the lower body back to the heart. The aorta is an artery, the superior vena cava returns blood from the upper body, and cardiac veins drain blood from the heart muscle itself.

Answer:

B. Inferior vena cava