Final answer:
The three ethical principles addressed by the Belmont Report are respect for persons, beneficence, and justice; together they set the standard for ethical research involving human subjects.
Step-by-step explanation:
The Belmont Report outlines three core ethical principles to guide research involving human subjects. These principles are: respect for persons, beneficence, and justice. Respect for persons involves acknowledging the autonomy of individuals and the requirement to provide extra protection to those with diminished autonomy. The principle of beneficence obligates researchers to maximize potential benefits and minimize possible harms to the research participants. Lastly, the principle of justice demands the equitable distribution of the costs and benefits of research. It is important that these principles guide all decisions related to the ethical treatment of human subjects in research.