During a Routine Assessment of a Newborn Prior to Discharge

During a routine assessment of a newborn prior to discharge, the nurse finds an axillary temperature of 99.2°F. Which of the following actions by the charge nurse is most appropriate?

A) Retake the temperature in 30 minutes.
B) Take a rectal temperature.
C) No action necessary.
D) Call the health-care provider prior to discharge.