कौन सा नैतिक सिद्धांत स्वैच्छिक भागीदारी और सूचित सहमति की मांग करता है?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The ethical principle of Justice allows the burdens of research to be concentrated on specific vulnerable groups to accelerate scientific discovery. Reason R: The principle of Justice ensures the fair distribution of the benefits and burdens of research among all groups in society and prevents the exploitation of vulnerable populations. In the light of the above statements, choose the most appropriate answer from the options given below: