Which example of research with prisoners would be allowable under the regulations? investigating genetic biomarkers as predictors of intelligence. examining the use of financial incentives to improve compliance with dentist appointments. examining age at first arrest as a predictor of adult criminal history. determining safety of a new formulation of deodorant?

The correct answer is Examining age at first arrest as a predictor of adult criminal history.

The participation of the prison population in research projects is quite  controversial. The greatest difficulty is found in the fact of the individual's autonomy, that is, the  his ability to decide on his participation in research projects may be  impaired due to its legal condition. Historically, the reeducated were used in  many research projects, especially where risks were high,  including many of them to death or irreparable damage to their well-being and health as  one all.