LaCourse and colleagues (2002)conducted a longitudinal study on the developmental trajectories of aggressive and violent behaviours in boys who receive a form of intervention. Their research found that:

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The study found that at risk boys who received the intervention were more likely to follow the lowest level trajectory, indicating that the intervention was beneficial in reducing their aggressive and violent behaviors. Option B is incorrect as the study did not find that the intervention and control groups had similar outcomes. Option C is incorrect as the study did find benefit from social skills and parenting training. Option D is also incorrect as the study found that early intervention was beneficial for at-risk boys.

LaCourse and Colleagues (2002)conducted a Longitudinal Study on the Developmental