A nurse is preparing to assess fetal heart tones for a client who is at 12 weeks of gestation. Which of the following actions should the nurse take?

Position the ultrasound stethoscope above the symphysis pubis to assess the fetal heart rate.

Perform Leopold maneuvers prior to auscultating the fetal heart rate.

Place the client in a side-lying position prior to assessing the fetal heart rate.

Measure the fundal height to determine the placement of the ultrasound stethoscope.