摘要： D. 主旨大意题.本文在第一段点题.根据第一段第四句“When it comes to the trip between Polynesia and South America, chickens may have been among the first ocean voyagers, according to new evidence. 并根据后面科学家对在玻利尼西亚群岛和南美洲挖出的鸡骨进行DNA鉴定等.可知D选项正确.

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