单选题：根据以下材料，回答题When my mother learned she was pregnant with me, m

根据以下材料，回答题
When my mother learned she was pregnant with me, my parents sat down one Sunday morn- ing to review their finances. Turning on the radio for a little light music, they penciled some calcu- lations for the savings they would need to make to pay for my college education. The music paused for an announcement that Japanese airplanes were attacking Pearl Harbor. The notes went into the wastebasket.
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Not so today for all the upheaval of the past half-century, this has been by far the most tran- quil period ever. Unlike any of their forebears, a majority of the world's young adults have good reason to develop plans for their old age. They know they will probably live to see the gr.eenhouse- warmed planet of the late 21st century.
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This is also unprecedented: never in history have people roused themselves against such a dis- tant threat. Millions of people and whole governments are addressing the issue. Even in the US ar- my, senior officers are studying, the implications for their organization and looking for ways to re- duce emissions. All this suggests that the pessimists who claim humanity is unable to rise to the challenge have got it wrong.Of course, it is no use having a long-term perspective without the means to do something about it. Fortunately, our social and political mechanisms are progressing swiftly.
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The past century has brought social progress as dramatic as that in industry. Economic stabili- ty, for example, is no accident: it is engineered by an international network of central banks, steadily expanding their cooperation. Non-governmental organizations provide new services, from the certification of "fair trade" coffee to secret cash transfers. In 1948, the UN formally consulted with 41 NGOs; it now consults with more than 1,600.
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Almost every week we see these powerful tools applied in novel ways. Consider what hap- pened recently when Texas power company TXU revealed plans to build a dozen coal-fired plants that would emit vast amounts of carbon dioxide. An alliance of environmentalist NGOs spotlighted the development on the Internet. Meanwhile, an international fmancial consortium took an interest. After intense negotiations, the consortium won the environmentalists' public blessing to buy TXU by promising to sharply reduce the planned emissions. The NGOs held no political office and wiel- ded no investment billions; their power came from the skilful organization of a million mouse clicks.
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These developments are nowhere near enough t~ guaragtee we can meet the challenge of cli- mate change. Time is short and the prospect of even partial success remains uncertain. Yet we can avoid catastrophe by mobilizing our ingenuity and community spirit. Addressing global wanning will require less sacrifice than defeating Fascism, but more foresight--and that is exactly what we have been acquiring. If humanity's track record with long-term problems shows mostly indifference and failure, that need not set precedent for our future.
A.Our civilization has grown more stable, not only because scientific advances have doubled life expectancy, but also because we have multiplied our capacity to store, transmit and ana- lyze information. Since 1990, both the volume and speed of traffic on the Intemet have doubled every two years or less. We are also much better informed than a generation ago about how society works.
B.As such, global warming poses an unprecedented problem. For the first time in history, we have learned with scientific precision of have calamities in store, and find we must change the very basis of the world economy. The remarkable thing is that our society appears to be responding.
C.There are immediate steps we can take to reduce emissions, but also, we must invest more heavily now in researching and developing new technologies to reduce emissions further in the future. We can see immediate results in lower emissions. But the real results we want-- avoiding drought, sea-level rise, disease, etc.--will come much later. We have to be will- ing to invest now to avoid much higher costs later.
D.Such was life back then: surprised repeatedly by wars and revolutions, by the rise and col- .lapse of ideologies like Fascism, and by periods of raging inflation and catastrophic depres- sion, few could confidently predict what their lives would be like even a decade ahead.
E.Most unexpected of all is the Intergovernmental Panel on Climate Change. The IPCC was created by conservatives to forestall "alarmist" declarations from self-appointed committees of scientists. Governments committed the IPCC to repeated rounds of study and debate, for- bidding any announcement except by unanimous consensus. It seemed a sure formula for pa- ralysis. However, the power of democratic methods, combined with rational argument, overcame all obstacles. The IPCC has evolved into a robust transnational institution that pro- vides authoritative conclusions of grave significance. It is, again, unprecedented.
F.This growth is driven not only by better communications and new ideas, but more importantly by the spread of democracy. Half the world's population now lives under democratic govern- ment. It is almost exclusively in these nations that the new cooperative institutions have been created.