Answer: Evidence based policing
Explanation: Evidence based policing is a practice whose policies and practices are derived from the systematic, scientific study of the effectiveness of various proven methods.
This method is effective and does not give room to chance or probability as it involves making decisions based on facts.
The answer is African Americans because they are likely to engage to activities that will lead them to have a stroke and by that, the incidence of stroke is high among them. Stroke occurs when the brain lacks oxygen and nutrients that causes an individual's brain cells to die.