War veterans and victims of violent attacks may experience nightmares, anger, and anxiety long after their exposure to violence. One reason is that

A) they have neither sympathetic nor parasympathetic nervous system responses.
B) brief reminders of the tragic experience trigger flashbacks.
C) they are still in the alarm phase of the response to stress.
D) they make little effort to understand their present surroundings.

Sympathetic Nervous System

Part of the autonomic nervous system that activates the fight or flight response during perceived threats, by increasing heart rate, blood pressure, and releasing adrenaline.

Parasympathetic Nervous System

A division of the autonomic nervous system responsible for relaxation and conservation of energy in the body.

Flashbacks

Sudden, intense re-experiencings of past events or traumas, often associated with PTSD.