One aggression-replacement program has brought down re-arrest rates of juvenile offenders by

A) desensitizing them to violent acts.
B) exposing them to adult models of aggression.
C) offering them opportunities to play violent video games when they feel angry.
D) encouraging them to engage in more thoughtful moral reasoning.

The aggression-replacement program mentioned in the question aims to replace aggressive behaviors with prosocial behaviors by focusing on cognitive-behavioral techniques such as conflict resolution, social skills training, and moral reasoning. By encouraging juvenile offenders to engage in more thoughtful moral reasoning, the program can reduce aggressive and criminal behavior, leading to reduced re-arrest rates. Desensitizing them to violent acts or exposing them to adult models of aggression would likely increase aggressive behavior, while offering them opportunities to play violent video games when they feel angry is not a cognitive-behavioral technique and does not address the underlying issues that led to their criminal behavior.