According to the belmont report, the moral requirement that there be fair outcomes in the selection of research subjects, expresses the principle of:
a. beneficence. b. respect for persons. c. justice.

C) Justice

Explanation:

Belmont report is the report that is created in regard with the field of research and clinical trial to protect and guard the participants .It maintains the safety of the human experiment participants by assuring that conduction of any experiment or research is done under the legal and ethical guidelines and regulations.

Justice is the factor in Belmont report that maintains just and fair practice of research where the involved parties do not have to face any inequity.Justice is maintained while opting subject, expense of conducting research etc.

Other options are incorrect because beneficiary focus on decrement in risk towards the subject and increase in beneficial outcome.Respect for the person participating in research and other involved parties should be maintained.Thus, the correct option is option(C).