In a Study That Explored the Causes of Posttraumatic Stress

In a study that explored the causes of posttraumatic stress disorder in Vietnam war veterans,researchers found that two things were necessary for a vet to develop chronic PTSD.What were they?

A) having a twin or close sibling and having prior experience with traumatic events
B) having a relatively small hippocampus and experiencing a traumatic event
C) being predisposed to sweaty palms and a shortness of breath
D) having a tendency to be nervous and suffering damage to the hippocampus

Correct Answer:

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