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?

Serum bilirubin level has increased from 6 hr ago

Jaundice moves from chest to groin level

Hemoglobin and hematocrit have increased

Transcutaneous bilirubin (TCB) level has decreased from 6 hr ago