【正确答案】 A

【答案解析】[听力原文]
   Today I'm going to talk about a very special kind of person. Psychologists call them "masters of deception": those rare individuals with a natural ability to tell with complete Confidence, when someone is telling a lie. For decades, researchers and law enforcement agencies have tried to build a machine that will do the same thing. Now a company in Massachusetts says that by using magnetic brain scans, they can determine with 97 percent accuracy whether someone is telling the truth.
   They hope that the technology will be cleared for use in American courts by early next year. But is this really the ultimate tool for you, the lawyers of tomorrow? You will not find many brain scientists celebrating this breakthrough. The company might be very optimistic, but the ability of their machine to detect deception has not provided credible proof. That's because the technology has not been properly tested in real world situations. In life, there are different kinds of lies and diverse contexts in which they're told. These differences may elicit different brain responses.
   Does their hypothesis behind the test apply in every case? We don't know the answer, because studies done on how reliable this machine is have not yet been duplicated. Much more research is badly needed. Whether the technology is eventually deemed reliable enough for the courts will ultimately be decided by the judges. Let's hope they're wise enough not to be fooled by a machine that claims to determine truthfulness at the flip of a switch. They should also be sceptical of the growing tendency to try to reduce all human traits and actions to the level of brain activity. Often they do not map that easily. Moreover, understanding the brain is not the same as understanding the mind: some researchers have suggested that thoughts cannot properly be seen as purely "internal". Instead, thoughts make sense only in reference to the individual's external world. So while there may be insights to be gained from matching behavior to brain activity, those insights will not necessarily lead to justice in a court, of law. Problems surround the use of machines to spot deception, at least until it has been rigorously tested. A high-tech test that can tell when a person is not telling the truth sounds too good to be true. And when something sounds too good to be true, it usually is.
   What have researchers and law enforcement agencies tried to do?
录音开头演讲者提到一类人：拆谎人(masters of deception)，这类人能够识别谎肓。接着说，几十年来，研究人员和执法部门一直在尝试制造一种也能识别谎言的机器(录音中do the same thing指前面提到的ability to tell...when someone is telling a lie)，故A项正确。
   B项“开发大脑磁性扫描器”利用录音提到的magnetic brain scans设干扰，录音说的是某家公司运用大脑磁性扫描的方法，与题目说的研究人员和执法部门无关。C项“检验法庭证据的可靠性”利用录音的American courts作干扰。D项“赢得人们的绝对信任”，录音没提到人们对研究人员和执法部门的信任问题，故排除D项。