Final answer:
To stimulate a non-reactive fetus during monitoring, external fetal vibroacoustic stimulation is the correct option. The correct answer is option (d).
Step-by-step explanation:
If a fetus is non-reactive during monitoring, several interventions can be employed to assess the state of the fetus further and possibly stimulate activity. While a maternal caffeine intake could have a stimulant effect, it is not a commonly recommended or standard practice for this purpose.
Fetal scalp stimulation involves the examiner touching the fetal scalp through the dilated cervix during labor. It is an invasive procedure and is usually performed to assess fetal heart rate response in the context of labor to check for well-being. An amniotic fluid infusion, which involves adding fluid into the amniotic cavity, can be a therapeutic measure in cases of oligohydramnios but does not directly stimulate fetal activity.
Meanwhile, external fetal vibroacoustic stimulation is a non-invasive procedure where an artificial larynx device is applied to the maternal abdomen over the area where the fetus's head is located. This method emits a combination of vibration and sound, which can stimulate the fetus, resulting in an accelerated heart rate or movement if the fetus is healthy and not in distress. Therefore, the correct option to wake up a non-reactive fetus would be (d) External fetal vibroacoustic stimulation.