GWD-TN-16的22题,急求NN解释~~

catherinexin

Springfield Fire Commissioner: the vast majority of false fire alarms
        are prank calls made anonymously from fire alarm boxes on street
        corners. Since virtually everyone has access to a private telephone,
        these alarm boxes have outlived their usefulness. Therefore, we
        propose to remove the boxes. Removing the boxes will reduce the
        number of prank calls without hampering people’s ability to report a fire.

Which of the following, if true, most strongly supports the claim that the
        proposal, if carried out, will have the announced effect?

 

A.    The fire department traces all alarm calls made from private telephones and records where they came from.

B.     Maintaining the fire alarm boxes costs Springfield approximately
        five million dollars annually.

C.     A telephone call can provide the fire department with more information about the
        nature and size of a fire than can an alarm placed
        from an alarm box.

D.    Responding to false alarms significantly reduces the fire department’s capacity for responding to fires.

E.     On any given day, a significant percentage of the public telephones
        in Springfield are out of service.

这题做过一次, 当然选的是C, 后来好像被纠正是A, 现在再做, 结果这里提供的答案是C, 然后我就迷惑了,...帮忙解释解释~~万分感谢啊!

catherinexin

可是A已经说trace all the calls, 那就说明没有hamper打电话的能力啊,而且trace也有利于reduce prank calls, but C only provides infomation, cannot assure the reduction of prank calls, 可否再详解下呢?

catherinexin

o 这样想我就懂啦~~~呵呵, 想不通就逆向思维,嗯, 谢谢哈~~~