What is the proper procedure for performing CPR?

The procedure for performing CPR, or Cardiopulmonary Resuscitation, is essential in emergency situations where a person is unresponsive and not breathing. The correct answer highlights the comprehensive steps involved in CPR, which include chest compressions, airway management, and rescue breaths.

Chest compressions are critical as they maintain blood circulation to vital organs, especially the brain and heart. The emphasis on airway management ensures that the airways are clear, allowing for effective rescue breaths to be administered. This triple-action approach is designed to provide the best chance of survival until emergency medical services arrive.

In contrast, performing only rescue breaths neglects the critical need for circulation provided by compressions. Also, simply checking for responsiveness and then calling for help without initiating CPR delays the potential benefit of immediate care, which can be life-saving. Lastly, the recommendation to call 911 and wait without actively engaging in CPR can lead to a poor outcome since every second counts in such emergencies. Thus, option D encapsulates the complete and effective method for delivering CPR.