A nurse is assessing an adolescent who experienced blunt trauma to the abdomen. Which of the following findings is the nurse's priority?

A. A low blood pressure (89/50 mm Hg) may indicate hypovolemic shock, which is a medical emergency and the priority. B. Abdominal pain rated 4/10 is concerning but not as critical as potential shock. C. A heart rate of 72/min is within normal limits and not immediately concerning. D. A respiratory rate of 20/min is normal and does not indicate an urgent issue.