A nurse is caring for a newborn who is experiencing hyperbilirubinemia and is receiving phototherapy. Which of the following findings indicate that the phototherapy is effective?

Choice A rationaleBlood glucose level changes are unrelated to hyperbilirubinemia and phototherapy, which specifically target bilirubin metabolism in the newborn's liver and skin.Choice B rationaleA decrease in transcutaneous bilirubin (TcB) levels shows effective phototherapy, as it converts bilirubin into water-soluble isomers that can be excreted.Choice C rationaleSkin color changes from yellow to normal indicate reduced bilirubin levels, but the most accurate measure of phototherapy efficacy is the decrease in TcB levels.Choice D rationaleWeight gain is not an indicator of effective phototherapy; it reflects overall nutrition and hydration status rather than bilirubin metabolism and excretion.