Cardiopulmonary resuscitation is used when A. there is no pulse and no breathing.
B. there is no breathing but there is a pulse.
C. there is no pulse but there is breathing.
D. none of the above.

A. there is no pulse and no breathing.

Explanation:

Cardiopulmonary resuscitation (CPR) is a lifesaving technique that's useful in many emergencies, such as a heart attack or near drowning, in which someone's breathing or heartbeat has stopped. The American Heart Association recommends starting CPR with hard and fast chest compressions.

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Explanation:

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