Figure 48.1 -Based on the Figure Above,showing Fetal and Adult Oxygen-Hemoglobin Saturation

Figure 48.1
-Based on the figure above,showing fetal and adult oxygen-hemoglobin saturation curves,which of the following conclusions is true?

A) Curve A represents the adult saturation curve.
B) Adult saturation occurs at lower partial pressures of oxygen than fetal saturation does.
C) At 50% saturation,fetal blood will have a higher affinity for oxygen than adult blood will.
D) As the partial pressure of oxygen increases,adult hemoglobin approaches saturation faster than fetal hemoglobin does.
E) Answers C and D are both true.