Final answer:
In this situation, the appropriate rescue technique would be Passive victim front rescue (option b).
Step-by-step explanation:
When approaching an unconscious victim who is horizontal in the water at the surface, it is important to prioritize their removal from the water before administering CPR. CPR is ineffective in the water, so the goal should be to bring the person to stable ground as quickly as possible. Once the victim has been rescued from the water, CPR can be initiated to provide the necessary life-saving measures.