Answer: (B) Is there a power differential between researchers and subjects?
Explanation:
IRB stand for the Institutional review board and the main responsibility of the IRB is that it basically protect the rights and the welfare of the human research activities under the given authorities.
IRB is also known as the constituted group that designed for the review purpose and also monitor various types of biomedical researches.
The IRB should consider all the potential subject and considered that the power differential between the subjects and the researches.