Question: What statement describes what happens to the carbon dioxide waste produced by a developing baby during pregnancy?

  Options: 
 A. It is carried by the umbilical cord to the placenta and then to the mother's blood.
 B. It is released from the fetus by its breathing and then is absorbed by the placenta.
 C. It is released through the fetal urine and then exits through the umbilical cord.
 D. It is carried through shared blood vessels and then to the mother's lungs.
Answer: A