Which example of research with prisoners would be allowable under the regulations?

Which example of research with prisoners would be allowable under the regulations?


Examining age at first arrest as a predictor of adult criminal history.


Examining the use of financial incentives to improve compliance with dentist appointments.


Investigating genetic biomarkers as predictors of intelligence.


Determining safety of a new formulation of deodorant.


Answer: Examining age at first arrest as a predictor of adult criminal history.