A nurse in the nursery is preparing to perform phenylketonuria (PKU) testing. Which neonate is ready for the nurse to test ?()
A.A 3-day-old neonate who has been fed IV since birth.
B.A 2-day-old neonate who has been breast-fed.
C.A 1-day-old neonate receiving formula.
D.A breast-fed neonate being discharged within 24 hours of birth.