While Assessing a Seven-Year-Old Girl, the Nurse Notices a Regular-Irregular

While assessing a seven-year-old girl, the nurse notices a regular-irregular heartbeat. The nurse listens carefully and notes that the heart rate increases on inspiration and decreases on expiration. What is the most appropriate action for the nurse to take next?

A) Record the finding as normal.
B) Notify the physician.
C) Schedule an EKG.
D) Ask the mother if a murmur has been detected before.