Answer:
Dissociative identity disorder (previously known as multiple personality disorder) is thought to be a complex psychological condition that is likely caused by many factors, including severe trauma during early childhood (usually extreme, repetitive physical, sexual, or emotional abuse).
Explanation:
The five stages are, denial, anger, bargaining, depression and acceptance.
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Answer:
The 3rd Option
Explanation:
Simple for this question, C: an investigation because it uses only observations.