What is the normal respiratory rate for a 43-year-old female?

A. 22-34 breaths per minute: This range is considered normal for toddlers and young children, not adults. Adult respiratory rates are lower due to larger lung capacity and more efficient gas exchange. B. 18-30 breaths per minute: This range is slightly elevated for a healthy adult and may indicate mild tachypnea. It is not considered the normal adult range. C. 12-20 breaths per minute: The normal respiratory rate for a healthy adult, including a 43-year-old female, is 12–20 breaths per minute at rest. This range allows for adequate ventilation and oxygenation without causing hyperventilation or hypoventilation. D. 10-18 breaths per minute: While slightly below the standard range, 10–18 may be seen in very fit adults or athletes but is not the typical reference range used for general adult assessment.