Final answer:
When performing a primary assessment, the next step would be to check for responsiveness. After that, you would check for breathing and a pulse, and then open the victim's airway.
Step-by-step explanation:
When performing a primary assessment after determining that the scene is safe, the next step would be to check for responsiveness.
Checking for responsiveness involves gently tapping the victim and asking if they are okay. If there is no response, it indicates that the person needs immediate attention and further assessment.
After checking for responsiveness, the next steps would be to check for breathing and a pulse, and then open the victim's airway.