What Is the Cause of Polycythemia in the Fetus

Multiple Choice

What is the cause of polycythemia in the fetus?

A) Fetal hemoglobin has a greater affinity for oxygen as a result of diphosphoglycerate (DPG) .
B) The fetus has a different hemoglobin structure of two a- and two g-chains rather than two a-and two b-chains.
C) Increased erythropoiesis occurs in response to the hypoxic intrauterine environment.
D) The lungs of the fetus are undeveloped and unable to diffuse oxygen adequately to the pulmonary capillaries.