Which example of situation where deferential vulnerability is factor?

Which is an example of a situation where differential vulnerability might be a factor?

A. An army medical officer recruiting subjects among the lower ranks.

B. An employer recruiting among persons who directly report to him.

C. A physician recruiting his patient.

D. A college professor recruiting among his students.

Ans. C. A physician recruiting his patient

This is a classic example of vulnerability through trust. A patient, especially a very sick patient, can be so trusting of their doctor that they accept at face value what the doctor tells them. They can have difficulty separating the doctor's role as a healer from the role of a researcher. This produces an asymmetrical power relationship based on the patient's trust and dependence on the doctor's knowledge and skill, and there develops a strong informal authority relationship develops.