OG19分册的一个新题求解答

MayCc

#232  The World Wildlife Fund has declared that global warming, a phenomenon most scientists agree to be caused by human beings in burning fossil fuels, will create havoc among migratory birds by altering the environment in ways harmful to their habitats as a result of altering the environment.A.
B.by altering the environment to the extent of it harming their habitats
C.by altering the environment in ways harmful to their habitats
D.from the fact that their habitats will be harmed by the environment being altered
E.from the fact that the environment will be altered and this will harm their habitats
答案是C，求比较详细的解答过程···

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fuckoffand

首先提走modifers - a phenomenon most scientists agree to be caused by human beings in burning fossil fuels - 句子变成The World Wildlife Fund has declared that global warming will create havoc among migratory birds ...

句子意思是全球变暖会制造迁移的鸟的大混乱，后面的句子也是修饰词，来解释全球变暖如何制造大混乱 -->DE OUT 因为不能从fact当中制造大混乱

a选项不知道是不是楼主贴错了，后面的as a result明显是多余且极其重复
b选项to the extent一般表示程度，而语句的意思是全球变暖通过不同的方式改变环境，脑补比如冰川融化／水平线上升下降等。

所以选c