Jermaine was discharged from the Army following two tours of duty in Iraq 4 years ago. Since then, he has been observed by his girlfriend to have a strong tendency to avoid crowds, an exaggerated startle response, a tendency to change the TV channel anytime something military related is discussed or depicted, nightmares, and a lack of memory about certain parts of his time in the military. Of what mental or medical health concern does Jermaine appear to exhibit many symptoms?
A. traumatic brain injury
B. posttraumatic stress disorder
C. alcoholism
D. suicidality
Answer: B
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