In Predicting Dangerousness, Which of the Following Would Be Most

In predicting dangerousness, which of the following would be most at risk of committing an aggressive act?

A) Sarah, who is angered at her husband, owns a gun, but has never used it
B) Evan, who has been aggressive in the past but, has adopted a pacifist approach to conflicts over the past five years
C) Iris, who was incarcerated for armed robbery and who, despite being released from prison, had numerous fights with other inmates
D) Alan, who has been working at a stressful job, but manages it by exercise and hunting.