Briefly explain why some might view Dissociative Identity Disorder as an extreme subcategory

Briefly explain why some might view Dissociative Identity Disorder (DID) as an extreme subcategory of PTSD (Post Traumatic Stress Disorder)

Reference

Comer, R. (2015). Abnormal Psychology, Ninth Edition. Worth Publishers; New York, New York. (ISBN 978-1-4641-7170-3)

American Psychiatric Association (2013). Diagnostic and statistical manual for mental disorders, (5th Ed.). American Psychiatric Publishing, Inc.; Washington, DC.

It is available at http://fcbonline-ed.mrooms3.net/