When a cancer patient's family asks if 'increasing the morphine will hasten death,' the nurse's best response is based on which ethical principle?
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A
Principle of justice — it is unjust to withhold pain relief
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B
Doctrine of double effect — the intent is relief of suffering, not hastening death
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C
Beneficence only — whatever benefits the patient is acceptable
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D
Autonomy — the patient decides dose regardless of outcome