Years After He Barely Survived a Terrorist Attack That Killed

Years after he barely survived a terrorist attack that killed 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) post-traumatic stress disorder.
D) dissociative identity disorder.