A) Incorrect. Defibrillation is used to stop abnormal heart rhythms, but it is not intended to restore a pulse directly. Effective CPR and defibrillation work together to improve the chances of restoring circulation.

B) Incorrect. While defibrillation can stop certain abnormal heart rhythms, it does not address all cardiac arrest situations.

C) Incorrect. Defibrillation is not used to relieve pain or discomfort. Its primary purpose is to restore a normal heart rhythm.

D) Correct. Early defibrillation is crucial because it helps to reset the heart's electrical activity, allowing the heart to resume an effective rhythm. The sooner defibrillation is performed, the better the chances of restoring a normal heart rhythm and improving the chances of survival.

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