As far as I understand it, I've always interpreted it as a bit of both. Granted, dissociation is often more a symptom and/or a result of trauma that coincides with C-PTSD. Of course, I always assumed attachment disorder(s) as, yet, another symptom. Honestly, due to these things I've contrasted and presumed C-PTSD/PTSD to be of it's own trauma-related-disorder with additional disorders as a result.