4 有關促發自殺行為的社會因子，下列何者正確？
(A)經濟繁榮，讓個體對於人生的意義為何感到質疑
(B)對於名人自殺相關新聞的持續報導
(C)綿密又錯綜複雜的社會支持網絡
(D)輿論視自殺為一種禁忌

Conversely, other factors may facilitate suicide including living in a culture in which ta- boos about suicide are weak, having ready access to firearms or other methods of suicide, learning of a recent suicide or exposure to publicized suicides, having impulsive-aggressive traits, and being alone (Fig. 1). The frontal cortex area of the brain which governs judgment, decision making, and impulse control does not fully mature until around age 25,9,10 which could explain why some teenagers could appear quick from thought to action in times of perceived crisis.1