Regarding Acute Stress and Posttraumatic Stress Disorders (PTSD), Which of the Following

Regarding acute stress and posttraumatic stress disorders (PTSD) , which of the following statements is FALSE?

A) Approximately 20 percent of military veterans returning from combat develop PTSD, including soldiers involved in combat in Iraq and Afghanistan.
B) Acute stress disorder lasts more than three months but less than a year.
C) Acute stress disorder and PTSD occur when people experience stresses outside the range of normal human experience.
D) Symptoms of acute stress disorder and PTSD may include insomnia, nightmares, irritability, explosive anger, or blunted emotions.