Trace the flow of blood from the heart to the different parts of the body.

A. right atrium → right ventricle → lungs → left atrium → right ventricle → body cells
B. right atrium → right ventricle → lungs→ left atrium → left ventricle → body cells
C. right atrium → left atrium → lungs → left ventricle → left atrium → body cells
D. right ventricle → right atrium → lungs → left ventricle→ left atrium → body cells