Psychologists who support the diagnostic criteria of dissociative identity disorder argue that the sharp increase inreported cases in recent decades is probably due to: a - the fact that most insurance plans now cover treatment for dissociative identity disorder. b - the greater prevalence of drug use among grade-school children, which may produce dissociative identity disorder in adulthood. c -greater clinical awareness of the disorder and of its symptoms and increased screening for dissociative symptoms. d -greater coverage of sensational dissociative identity disorder patients in movies and television shows, making it easier for disturbed people to mimic the symptoms.