Final answer:
The proper sequence for performing hands-only CPR is to check the scene for safety, call 9-1-1, and then start CPR, continuing until paramedics arrive.
Step-by-step explanation:
The correct sequence for performing hands-only CPR is as follows: check the scene for safety, call 9-1-1 for emergency medical assistance, and then start hands-only CPR by applying pressure to the sternum, ideally between the lines at T4 and T9 as per Figure 19.3. It is important to continue performing CPR until paramedics arrive or the person shows signs of life. Artificial respiration, or mouth-to-mouth breathing, is not the focus in hands-only CPR; the emphasis is on providing high-quality chest compressions to maintain blood flow, particularly to the brain.
Therefore, the correct answer is: B. Check the scene; Call 9-1-1; Start CPR; Stop after the paramedics arrive.