Which of the Following Statements Accurately Describes Why a Mother

Multiple Choice

Which of the following statements accurately describes why a mother and her child can have different blood types?

A) The two blood systems of the placenta remain separate throughout the pregnancy.
B) The fetal arteries connect to the mothers circulation system, but the maternal hormones prevent cross-contamination of blood.
C) The placenta's only function is to bring oxygen and nutrients to the fetus, with no return transfer to the mother.
D) The placenta's only function is to transfer fetal waste away from the fetus to the mother, with involvement of the fetus' blood supply.