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?

Rationale: A. "This medication prevents your baby from developing jaundice.": Phytonadione (vitamin K) does not play a role in bilirubin metabolism or the prevention of jaundice. Jaundice results from immature liver function and increased bilirubin levels, unrelated to vitamin K activity. B. "This medication prevents your baby from developing bleeding problems.": Phytonadione is given to newborns to promote clotting factor synthesis and reduce the risk of hemorrhagic disease of the newborn. Newborns have low vitamin K stores at birth, making supplementation essential for preventing bleeding disorders. C. "This medication enhances regulation of your baby's temperature.": Thermoregulation in newborns is managed by external warming and metabolic processes, not by vitamin K. Phytonadione has no impact on temperature control or thermal stability. D. "This medication enhances your baby's immune response.": Vitamin K does not affect immune function. Its role is in coagulation, not immune system development or enhancement, and therefore does not influence infection prevention or immune strength.