题目内容：
根据以下材料，回答题Tolive in the United States today is to gain an appreciation for Dahrendorf'sassertion that social change exists everywhere.Technology, the application ofknowledge for practical ends, is a major source of social change.
Yet wewould do well to remind ourselves that technology is a human creation; it doesnot exist naturally.A spear or a robot is as much a cultural as a physicalobject.Until humans use a spear to hunt game or a robot to produce machineparts, neither is much more than a solid mass of matter.For a bird looking foran object on which to rest, a spear or robot serves the purpose equallywell.The explosion of the Challenger space shuttle and the Russian nuclearaccident at Chernobyl drive home the human quality of technology; theyprovide cases in which well-planned systems suddenly went haywire and there wasno ready hand to set them right.Since technology is a human creation,we areresponsible for what is done with it.Pessimists worry that we will use ourtechnology eventually to blow our world and ourselves to pieces.But they havebeen saying this for decades,and so far we have managed to survive and evenflourish.Whether we will continue to do so in
theyears ahead remains uncertain.Clearly, the impact of technology on our livesdeserves a closer examination.
Fewtechnological developments have had a greater impact on our lives than thecomputer revolution.Scientists and engineers have designed specialized machinesthat can do the tasks that once only people could do.There are those who assertthat the switch to an information-based economy is in the same camp as othergreat historical milestones, particularly the Industrial
Revolution.Yetwhen we ask why the Industrial Revolution was a revolution, we find that it wasnot the machines.The primary reason why it was revolutionary is that it led togreat social change.It gave rise to mass production and, through massproduction, to a society in which wealth was not confined to the few.
Insomewhat similar fashion, computers promise to revolutionize the structure ofAmerican life, particularly as they free the human mind and open newpossibilities in knowledge and communication.The Industrial Revolutionsupplemented and replaced the muscles of humans and animals by mechanicalmethods.The computer extends this development to supplement and replace someaspects of the mind of human beings by electronic methods.And it's the capacityof the computer for solving problems and making decisions that represents itsgreatest potential and that poses the greatest difficulties in predicting theimpact on society.
Accordingto the passage, when will a spear or a robot has the quality of technology? A．Whenit is utilized by human beings.
B．Whenit is used to produce new products.
C．Whenit has some cultural meanings as physical object.
D．Whenit is useful for both man and animal.
参考答案：
答案解析：