Post-traumatic stress disorder is unique among psychological disorders because: a. the cause of the disorder may be specified with certainty b. the genetic markers for the disorder are well known c. the symptoms are generally mild and do not cause distress d. the risk factors are generally correlational

The answer is A. The cause of the disorder may be specified with certainty.

Post-traumatic stress disorder is a mental health condition that is triggered by a terrifying event which can arise from either experiencing or witnessing the event. Symptoms of this disorder may include flashbacks, nightmares and severe anxiety, as well as uncontrollable thoughts about the event.

c it has to be i googled it