Answer:
The answer is - Principle of Justice
Step-by-step explanation:
The Belmont Report summarizes ethical principles and guidelines for research involving human subjects, it includes three principles which are; The Respect for Persons, Justice and Beneficence.
The principle of Justice addresses the distribution of the burdens and benefits of research. It calls for balance between the kind of participants in the research and the kind of people who benefit from it. It is the belief that the participants in a research study should be the type of people who will also benefit from a research study. It should not be the case that one group in the society bears the cost of research while another group reap its benefits.
Like in Dr. Kushner's study, the participants should also benefit from the study.