题目内容：
According to Paragraph 1，the tamarin story can be retold chronologically as follows： Ⅰ．Tamarins were declared extinct．
Ⅱ．No one saw a tamarin in the wild．
Ⅲ．Tamarins used to live in forests in southern Brazil．
Ⅳ．The researchers have been doing everything they can to save tamarins．V．Some researchers found by chance a small set of tamarins．
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答案解析：