During a prenatal examination, an adolescent client asks, How does my baby get air? The nurse would ...

During a prenatal examination, an adolescent client asks, How does my baby get air? The nurse would give correct information by saying:
 
  A. The lungs of the fetus carry out respiratory gas exchange in utero similar to what an adult experiences.
   B. The placenta assumes the function of the fetal lungs by supplying oxygen and allowing the excretion of carbon dioxide into your bloodstream.
   C. The blood from the placenta is carried through the umbilical artery, which penetrates the abdominal wall of the fetus.
   D. The fetus is able to obtain sufficient oxygen due to the fact that your hemoglobin concentration is 50 greater during pregnancy.