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?

A. At 12 weeks of gestation, the fetal heart tones can typically be heard using a Doppler ultrasound device placed above the symphysis pubis. B. A side-lying position is not required for assessing fetal heart tones at this gestational age. C. Fundal height is more useful in later stages of pregnancy, and it is not necessary to measure it for assessing fetal heart tones at 12 weeks. D. Leopold maneuvers are used to determine the position of the fetus, but they are not typically performed before assessing fetal heart tones.