The section that shows this change in the profile of shooters is the one that shows that people who have never had problematic behavior or a bad life history can become a shooter in a school.
This section is presented by option B, which is the correct answer.
Although you have not shown the text this question refers to, we can tell you, based on the context of your question, that you are referring to the article "Thresholds of Violence."
After reading this article, we can see that:
This shows the reader that just as the profile of shooters changes drastically over the years, the laws, responsible for dealing with these cases, must change as well, to be increasingly efficient and promote protection in schools.
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