The Nurse Assesses a 12-Hour-Old Newborn's Serum Bilirubin Level and Finds

The nurse assesses a 12-hour-old newborn's serum bilirubin level and finds it to be 14 mg/dl. What nursing intervention would be included in the plan of care for this newborn?

A) Continue to observe.
B) Begin phototherapy.
C) Begin blood exchange transfusion.
D) Stop breastfeeding.