This question is for a medical course i am taking online this summer and I really need help on it Blood returns to the heart from the systemic circulation through which blood vessels?

aorta, coronary sinus, pulmonary veins

inferior vena cava, superior vena cava, coronary sinus

pulmonary veins, inferior vena cava, superior vena cava

inferior vena cava, superior vena cava, aorta

The answer is inferior vena cava, superior vena cava, and coronary sinus.

Explanation:

Pulmonary veins return blood from lungs to heart to be circulated through the body so that eliminates that option. Aorta is the major vessel that transports blood into systemic circulation. superior and inferior vena cava are the two major vessels for blood return from systemic circulation into the heart?

answer; /// i believe that the correct answer is (d); /// alternate walking and running;

perspiration and respiration.