Your EMT student has a good understanding of end-tidal carbon dioxide monitoring when she states:

A) "The normal value should be 45 to 55 mmHg."
B) "End-tidal carbon dioxide monitoring should be used only when the patient is being artificially ventilated."
C) "Any disturbance to the breathing, circulation, or metabolic state of the patient can alter the reading."
D) "Only paramedics and AEMTs are allowed to utilize end-tidal capnography."

C) "Any disturbance to the breathing, circulation, or metabolic state of the patient can alter the reading."