Answer:
The correct option is: A. experiencing trauma in isolation
Step-by-step explanation:
Posttraumatic stress disorder is a type of mental disorder caused due to exposure to a traumatic event, characterized by physical or mental distress, recurring disturbing feelings, thoughts or dreams related to the trauma, avoiding any trauma-related cue, altered thoughts and feelings and increased fight-or-flight response.
People who experience severe interpersonal trauma like child abuse or abuse are more likely to develop this disorder. The risk of this disorder increases in the absence of proper social support system.
Therefore, experiencing trauma in isolation is not one of the factors responsible for the development of posttraumatic stress disorder.