Question

you witness a child suddenly collapse on the playground. you are the only rescuer, and you do not have a phone nearby. after confirming that the child is not breathing and there is no pulse, what is your next step?
choose the correct answer
stay with the victim until als providers arrive
give 2 minutes of cpr
leave the victim to activate the emergency response system and get the aed
recheck the victims pulse and breathing

Explanation:

In a situation where a child has collapsed, is not breathing, and has no pulse, and the rescuer is alone with no phone nearby, the priority is to start CPR immediately. However, if there is an AED (Automated External Defibrillator) available, activating the emergency response system (which in this case might involve going to get help if no phone) and retrieving the AED is crucial as early defibrillation can significantly improve survival rates. But if we assume the options are as per standard CPR guidelines (for a lone rescuer with no phone - in some protocols, for an adult you'd leave to call 911 first but for a child/infant with suspected cardiac arrest due to asphyxia - like in a drowning or choking - you start 2 minutes of CPR first. But if it's a sudden collapse (possible cardiac cause), getting the AED is important. But if we go by the options:

• Staying until ALS (Advanced Life Support) providers arrive without taking action is incorrect as immediate intervention is needed.
• Rechecking pulse and breathing wastes time.
• Between giving 2 minutes of CPR and leaving to activate emergency response (which might include getting AED if available). If we assume the setting is a place where AED is accessible (like a school playground might have one), the best is to leave to activate (call if possible - but since no phone, maybe go get AED if nearby). But if no AED, then start CPR. But if the options are as given, in some algorithms (e.g., American Heart Association for single rescuer child - if sudden collapse (presumed cardiac - like VF - Ventricular Fibrillation which AED can shock), the steps are: Check responsiveness - no → shout for help (if no one, leave to activate emergency response (call 911 if phone - but here no phone, so maybe go get AED if in vicinity) → start CPR. But if it's a non - sudden (e.g., respiratory cause - like drowning), start CPR first. But the question says "suddenly collapse" - more likely cardiac. However, another view: if you are the only rescuer, no phone. If you leave to "activate emergency response" (which might mean going to a phone or getting AED), but if you leave, the child has no CPR. But the option "Give 2 minutes of CPR" - 2 minutes is about 5 cycles (30:2) which is 2 minutes. In some guidelines (e.g., for a lone rescuer with a child - no phone - if it's a witnessed sudden collapse (possible cardiac), you can leave to activate (get AED) but if unwitnessed, start CPR. But the options: If we assume the answer is based on "when you can't call (no phone), for a child, start CPR (2 minutes) first. But another perspective: If there is an AED, getting it is important. But the options: "Leave the victim to activate..." - if activating means getting AED (and assuming it's nearby). But in standard first aid for a child (1 - 8 years) with no pulse/no breathing (witnessed collapse - possible cardiac):
• If two rescuers: one activates, one starts CPR.
• If one rescuer: if phone available - call first (if adult - call first, if child - call after 2 minutes of CPR (if no phone, start CPR). But here no phone. If AED is accessible (like in the school), leave to get AED (activate emergency - which might involve alerting others if possible) and start CPR as soon as possible. But the options: "Give 2 minutes of CPR" is a standard initial intervention when immediate defibrillation (AED) is not immediately available.

Answer:

Give 2 minutes of CPR