Answer:
A. The symptoms considered abnormal are the lack of memory that Tamara has and the different names in her documents.
B. I would be tempted to diagnose it as someone with dissociative personality disorder.
C. As a treatment, the most suitable would be psychotherapy and the use of medications.
Explanation:
At the first moment we read about Tamara's case, we may be tempted to think that she has amnesia and therefore does not remember anything about her past. However, when we continue to read about her history and the way she behaves, we can consider that she suffers from dissociative personality disorder, where she assumes to be a completely different person, which explains the different name that she presents in the documents and the disappearance of a woman just like her who lived in another city.
Amnesia is one of the symptoms of dissaciative personality disorder, which causes the person to completely forget basic and personal information about his life, at the time when another personality takes control. This symptom reinforces the diagnosis for dissociative personality disorder.
The most suitable in this case, was that Tamara had psychotherapy sessions in order to be able to reintegrate her true personality. In addition, the use of medications could be necessary.