Years after he barely survived an attack that injured his wife and two children,Mr.Puskari suffers recurring flashbacks and frequent nightmares of the event that render him incapable of holding a steady job.Mr.Puskari is most clearly showing signs of

A) obsessive-compulsive disorder.
B) generalized anxiety disorder.
C) posttraumatic stress disorder.
D) survivor resiliency.

Mr.Puskari's symptoms of recurring flashbacks and nightmares, as well as his inability to hold a steady job, are all common symptoms of posttraumatic stress disorder (PTSD). PTSD can develop after a person experiences or witnesses a traumatic event, such as the attack Mr. Puskari survived, and can cause significant distress and impairment in daily functioning. Obsessive-compulsive disorder (A) and generalized anxiety disorder (B) may involve symptoms of recurring thoughts or worries, but they do not necessarily stem from a traumatic event. Survivor resiliency (D) refers to a person's ability to bounce back and recover from a traumatic experience, but Mr. Puskari's difficulties suggest he is struggling to do so.