【正确答案】 A

【答案解析】[听力原文]
   The sense of sound is one of our most important means of knowing what is going on around us. Sound has a waste product, too, in the form of noise. Noise is growing and it may get much worse before it gets any better.
   Scientists have been studying how noise affects people and animals. They are surprised by what they have learned. Peace and quiet are becoming harder to find.
   Noise pollution is a threat that should be looked at carefully.
   There is a saying that it is so noisy that you can't hear yourself think. Doctors who study noise believe that we must sometimes hear ourselves think. If we don't, we may have headaches, other aches and pains, or even worse mental problems.
   Ways of making less noise are now being tested. There are even laws controlling noise. We cannot return to the "good old days" of peace and quiet. But we can reduce noise, if we shout loudly enough about it.
   Why are scientists surprised by the findings in their noise study?
关键在于听到“和平与安宁正变得愈发难寻”，A是其同义表达，故正确。选项B、C都是利用原词进行语音干扰，D在录音中未提及。