Which purposes of placental functioning would the nurse plan to include in a prenatal class? Select all that apply .None
选项：

A:It cushions and protects the baby .
B:It maintains the temperature of the baby .
C:It is the way the baby gets food and oxygen .
D:It prevents all antibodies and viruses from passing to the baby .
E:It provides an exchange of nutrients and waste products between the birthing parent and developing fetus .