Which of the Following Situations Is NOT a Way in Which

Which of the following situations is NOT a way in which a baby acquires normal microbiota?

A) Microbes cross the placenta during pregnancy.
B) The baby acquires the residential microbiota in the colon after the first meal.
C) Microorganisms grow in the respiratory tract after the babyʹs first breath.
D) Staphylococcus epidermidis is transferred from the hospital staff to the newborn after delivery.
E) Microbes enter the nose and mouth when the baby is in the birth canal.