7 根據 Wilcox 與 Wyman（2016）的文獻回顧，以下有關促進自殺意念者自殺身亡的因素，何 者錯誤？
(A)衝動、煩躁及攻擊性由強減弱
(B)獨居
(C)易取得自殺方法或工具
(D)知悉他人自殺

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