[单项选择]Passage Four Science and politics make uncomfortable bedfellows. Rarely is this more true than in the case of climate change, where it is now time for emergency counseling. One point repeatedly made at last week’s climate change congress in Copenhagen was that formulating an action plan to curb climate change is not a job of scientists. Politicians may be left scratching their heads over what to do, but at this stage climate scientists cannot provide more guidance than they did in the 2007 report from the Intergovernmental Panel on Climate Change, for two reasons. First, models will never provide a straightforward prediction of how the climate will change. As one Copenhagen delegate put it: "Tell me what the stock market will do in 100 years and I will tell you what the climate will do." Second as most climate scientists will agree, their role is not to formulate policy. They can provide more or less apocalyptic (大灾预测的) scenarios of what will happen if emissions hit cert
A. tend to be more conservative than politicians
B. are in no position to offer a definite answer
C. never trust politicians as in other cases
D. feel incapable more than ever before

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