The nurse is reviewing fetal circulation with parents after the diagnosis of a heart defect. Which statement by the nurse is correct?

Rationale: A. "The ductus arteriosus is a shunt that allows oxygenated blood in the umbilical vein to bypass the liver and go to the heart.": The ductus arteriosus connects the pulmonary artery to the aorta, allowing blood to bypass the fetal lungs, not the liver. B. "The ductus venosus is a shunt that allows oxygenated blood in the umbilical vein to bypass the liver and go to the heart.": The ductus venosus carries well-oxygenated blood from the placenta past the liver and into the inferior vena cava, directing it toward the fetal heart. C. "The foramen ovale is a shunt that allows deoxygenated blood in the umbilical vein to bypass the liver and go to the heart.": The foramen ovale is an opening between the right and left atria that bypasses the lungs and it carries mixed oxygen blood not solely deoxygenated blood. D. "The ductus aorta is a shunt that allows deoxygenated blood in the umbilical artery to bypass the liver and go to the heart”: There is no fetal shunt called the “ductus aorta,” and the umbilical arteries carry deoxygenated blood from the fetus to the placenta not to the heart.