The article's author aims to show that anyone is capable of participating in a violent act, as shown in option A.
We can arrive at this answer because:
The author shows how people who plan or carry out school shootings, or other violent acts, do not follow a pattern.
This is because some of these people have a violent life history, where they were abused. Other people have serious psychological problems and others do not have any problem, experience, or trauma that justifies their participation in violent acts.
This shows that it is very difficult to draw a profile of this type of offender, as anyone can fit into this type of situation.
