Final answer:
A CNA should record the vital signs of a patient who is actively dying once every 15 minutes.
Step-by-step explanation:
If a patient is actively dying, a Certified Nursing Assistant (CNA) should record the patient's vital signs once every 15 minutes. Vital signs including heart rate, blood pressure, respiratory rate, and temperature are essential indicators of a patient's overall health and can provide important information about their condition. Recording vital signs every 15 minutes allows healthcare professionals to closely monitor any changes or deterioration in the patient's condition.