Lauren, a G1P0 at 37 Weeks' Gestation, Calls the Clinic

Lauren, a G1P0 at 37 weeks' gestation, calls the clinic and tells the nurse that her baby has been moving a lot less for the past two days. Which of the following responses made by the nurse is the most appropriate in this situation?

A) "Increase your intake of foods that are high in sugar content."
B) "Lie down on your side, and record how long it takes you to feel 10 distinct fetal movements."
C) "See your physician as soon as you can. An ultrasound is necessary."
D) "You may take a very hot bath to stimulate fetal movement."