Based Upon the Research with Vietnam Veterans, Which Factors Are

Based upon the research with Vietnam veterans, which factors are the best predictors of posttraumatic stress disorder (PTSD) ? (Select all that apply.)

A) The severity of the stressor
B) The degree of ego strength
C) The degree of psychosocial isolation in the recovery environment
D) The attitudes of society regarding the experience
E) The presence of preexisting psychopathology