Which of the following is a sign that an infant requires CPR?

An infant requires CPR when they are unresponsive and not breathing because these conditions indicate that the infant is in a life-threatening situation. In such cases, the vital organs, particularly the brain and heart, are at risk due to lack of oxygen. Unresponsiveness signifies that the infant cannot respond to stimuli, suggesting a severe medical emergency. If the infant is not breathing, this further emphasizes the urgency for CPR, as immediate intervention is critical to restore oxygen circulation and minimize the risk of death or permanent damage.

The other options presented, such as coughing, breathing normally, or crying, do not indicate an immediate need for CPR. Coughing suggests that the infant may be trying to clear an airway obstruction, and normal breathing indicates that the infant is maintaining adequate oxygenation. Crying also demonstrates that the infant is responsive and can breathe effectively, suggesting that they do not require CPR. Thus, the combination of unresponsiveness and absence of breathing clearly identifies the need for immediate life-saving measures like CPR.