A nurse is teaching an assistive personnel to measure a newborn's respiratory rate. Which of the following statements indicates an understanding of why the respiratory rate should be counted for a complete minute?

Rationale: A. While activity can increase the respiratory rate, this is not the reason the rate must be counted for a full minute. B. Newborns do expand their lungs, but the depth of respirations can vary; this is not the primary reason for counting a full minute. C. Newborns have irregular breathing patterns, including periods of apnea, so counting for a full minute ensures an accurate measurement. D. It is true that newborns are abdominal breathers, but this fact does not explain why the rate should be counted for a full minute.