Answer and explanation

Correct answer: C. The underlying cause or origin of a disease

  1. Step 1: Greek 'aitia' means cause, and '-logy' means study of. Step 2. Etiology refers to the fundamental causative agent or biological origin of a pathology (e.g. the etiology of cholera is Vibrio cholerae). Answer: The underlying cause or origin of a disease. Why not the others: Expected mortality is case fatality rate; Drug clearance is pharmacokinetics; Surgical technique is operative procedure.

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