What is the normal respiratory rate (RR) range for adults?

The normal respiratory rate for adults typically ranges from 12 to 20 breaths per minute at rest. This range reflects the average respiratory rates observed in healthy adults under normal conditions. The reason this range is accepted in clinical practice is that it accounts for variations based on factors such as age, fitness level, and overall health status.

While the choice provided accurately captures a portion of the normal range, it may not fully encompass the most comprehensive understanding which includes rates up to 20. Therefore, the correct answer lies outside the limits established by selections that do not adequately reflect the typical norms, emphasizing the importance of recognizing the broader accepted range in medical practice.