Final answer:
According to the information provided, it is true that an IRB could not approve this protocol because the research must be material to the lives of the prisoners.
Step-by-step explanation:
According to the given information, the statement that an IRB could not approve the protocol is true. In this case, the prison population is viewed as a population of convenience, meaning that the research taking place in prisons must be material to the lives of the prisoners. Therefore, factors such as the level of risk and proposed facility are irrelevant since they do not directly impact the prisoners. As a result, the IRB would not be able to approve a protocol that lacks material relevance to the lives of the prisoners.