To prepare for his quiz on CPR, Woo Jin listed the steps he learned in his online health class.1. Check for consciousness.2. Check for a pulse.3. Call 911.4. Perform 100–120 chest compressions per minute.5. Push hard and fast during compressions.6. Perform CPR until the person starts breathing or help comes.Woo Jin got 5 out of 6 on his quiz.

Step 2 is incorrect for a person who is not trained to check a pulse: checking can delay CPR, so check for responsiveness and breathing, call 911, and begin compressions if needed. The other listed steps are consistent with CPR guidance: compress at 100–120 per minute, push hard and fast, and continue until the person shows signs of life or help takes over. The incorrect step is “Check for a pulse.”

AI-written and checked against the verified answer.