Answer:
either A or D I think. I'm not for sure,in it makes sense
Here are the steps for blood flow to the heart:
<span>to the superior and inferior vena cava,then to the right atrium.through the tricuspid valve.to the right ventricle.through the pulmonic valve.to the pulmonary artery.<span>to the lungs.</span></span>
I do not have the coronavirus.