In what situation should chest compressions be halted?

Chest compressions during CPR should be halted under specific circumstances to ensure that the victim receives the best possible care. Each of the situations mentioned provides a valid reason to stop compressions.

When emergency services arrive, they are trained professionals who can take over the care of the victim effectively. Their arrival signifies that more advanced medical assistance is now available, making it appropriate to discontinue chest compressions in favor of transitioning the care appropriately.

If the victim starts breathing on their own, this is a positive sign indicating that they may have regained circulation. In such instances, it is crucial to check for breathing and pulse regularly. Once normal breathing resumes, continuing chest compressions is no longer necessary, as the primary goal is to restore normal function.

Lastly, if the person performing CPR becomes exhausted, it is critical to understand that maintaining effective compressions is essential. Performing compressions while fatigued can lead to ineffective compressions, potentially compromising the victim's chances of recovery. In such cases, if additional help is available or a rotation can be made, it allows for the continuation of care without any break in chest compressions.

Considering these points, all of the given scenarios are valid reasons to halt chest compressions, making the choice that includes all these situations correct.