A nurse is reinforcing teaching with new parents about the provider's prescription for a serum bilirubin test. Which of the following statements should the nurse include in the explanation?

A. "Your baby is at a higher risk because they were born with congenital dermal melanocytosis.": Congenital dermal melanocytosis, also known as Mongolian spots, are harmless pigmented birthmarks and are unrelated to bilirubin levels or jaundice risk in newborns. B. "This is because your baby is breastfed. You should start supplementing with formula.": Breastfeeding itself is not a reason to stop or supplement with formula unless medically necessary. Breastfeeding jaundice can occur, but proper feeding techniques and frequency usually manage it without needing supplementation. C. "Your baby is at a higher risk because they have had four bowel movements in the first day of life.": Frequent bowel movements actually help lower bilirubin levels by aiding in the excretion of bilirubin through stool, so this would not increase jaundice risk. D. "This is because your baby's liver is not yet efficient at breaking down red blood cells.": Newborns often experience physiological jaundice because their immature livers cannot efficiently process the breakdown products of red blood cells, leading to elevated bilirubin levels in the blood.