The ethical theory that is illustrated by triage in disaster nursing is utilitarianism.
How is utilitarianism used in nursing?
According to utilitarianism, the fundamental principles of nursing may all be understood in terms of how decisions affect patients, families, healthcare providers, and other stakeholders. Prioritizing patients who are most likely to benefit from treatment and/or are the youngest and therefore have the most years left to live means that the utilitarian benefit in a crisis is often understood as either saving the most lives or saving the most life years.
Hence the answer is c. Utilitarianism
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