Answer:
Institutional Review Board.
Step-by-step explanation:
Research is mainly done for the human benefits. The unethical research includes the research that can harm the organisms and can break some scientific law.
The IRB (Institutional review board) looks into the matter of the research ethics and pays attention to the research proposal made by the scientists that do not break the ethics. This board prevents the unethical practice in the research.
Thus, the correct answer is option (d).