According to the passage which of the following statements is TRUE？A．Starving polar bears
According to the passage, which of the following statements is TRUE？
A．Starving polar bears are increasingly coming into villages, where they may be killed either for food or safety.
B．Polar bears can spend their entire lives on land if the sea ice melts completely.
C．Two-thirds of the world"s polar bears may disappear by 2050 as global warming continues.
D．The growing distance between ice packs is not a problem for polar bears, because they are excellent swimmers.
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
事实细节题。A选项中提到北极熊因为饥饿而闯入村庄——comingintovillage，这个在原文中没有信息提到，所以排除。B选项中的spendtheirlivesonland帮助我们定位到原文的第三段开头——polarbearscan’tsurviveforlongonland．与选项意思正好相反，所以排除。原文第二段最后一句Thatmaycausetwo—thirdsoftheword’s20，000po—larbearstobegonebythentoo．及前一句…theArcticcouldbefreeofsummerseaiceby2050与C选项信息一致。原文第四段第三句话Thebearsmustswimlongerdistancesbetweenicepacks(大片浮冰)，andtheycan’talwaysmakeit．与D选项中notaproblem意思相左，因此排除。故选C。