单选题 Which of the following can be the best title for the passage?

【正确答案】 C
【答案解析】[解析]哪一个最适合作文章标题:纽约是怎样变成美国第一大城市的?从第一段可知: Today it is the largest city in America.How to explain the change in its size and importance?全文都在解释其原因。故应选C。