A nurse is caring for a client who asks why her newborn is receiving a phytonadione injection. Which of the following statements should the nurse make?

A. "This medication enhances regulation of your baby's temperature": Phytonadione (vitamin K) does not affect thermoregulation. Newborn temperature is maintained through environmental control and brown fat metabolism, not vitamin K administration. B. "This medication prevents your baby from developing bleeding problems.": Vitamin K is essential for synthesis of clotting factors II, VII, IX, and X. Newborns have low vitamin K stores, placing them at risk for hemorrhagic disease of the newborn. Administering phytonadione reduces the risk of serious bleeding complications. C. "This medication prevents your baby from developing jaundice": Jaundice in newborns is primarily caused by bilirubin accumulation due to immature liver function. Vitamin K administration does not prevent hyperbilirubinemia. D. "This medication enhances your baby's immune response": Immune protection in newborns is provided through maternal antibodies and vaccines, not vitamin K. Phytonadione’s role is limited to coagulation support.