A Midwife Is Teaching a Group of Student Midwives About

A midwife is teaching a group of student midwives about fetal circulation. Which of the following statements made by one of the students indicates that further teaching is necessary?

A) "During the intrauterine life, the fetus obtains oxygen and excretes carbon dioxide from the placenta."
B) "A fetal heart rate between 120 to 160 beats per minute is necessary to supply oxygen to cells, as the red blood cells are not fully saturated."
C) "As oxygenated blood enters the right atrium, most of it is shunted into the left atrium through the foramen ovale."
D) "The oxygenated blood coming from the placenta enters the fetus through the umbilical artery."