Dissociative disorders usually develop as a(n) a. result of severe injury or blow to the head b. individual decreases the intake of antianxiety medication c. reaction to trauma or distress in order to keep painful memories hidden d. result of several brain diseases or drug and alcohol intoxication

your answer is c.  

REACTION TO TRAUMA OR DISTRESS IN ORDER TO KEEP PAINFUL MEMORIES HIDDEN.

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C. reaction to trauma or distress in order to keep painful memories hidden

Explanation:

Dissociative disorders are conditions that involve problems with memory, awareness, emotion, identity, behavior or perception. Dissociative disorders usually develop as a reaction to psychological  trauma or distress and help keep painful or difficult memories hidden. Some dissociative disorders are also triggered by psychoactive substances. The three major dissociative disorders are; dissociative amnesia, dissociative identity disorder and depersonalization-derealization disorder .

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