Theory suggests a history of child abuse involved in the development of dissociative identity disorder.

A) Learning
B) Cognitive
C) Posttraumatic
D) Biological

Dissociative identity disorder (DID) is often caused by severe and repeated childhood trauma, such as physical, emotional, or sexual abuse. Posttraumatic theory suggests that DID develops as a coping mechanism to dissociate from traumatic experiences. Learning theory is not specific to the development of DID, and cognitive and biological theories have limited evidence to support their relationship to the disorder. Therefore, C is the best choice.