求教GWD-18-Q22

In each of the past five years, Barraland’s prison population has increased.  Yet, according to official government statistics, for none of those years has there been either an increase in the number of criminal cases brought to trial, or an increase in the rate at which convictions have been obtained.  Clearly, therefore, the percentage of people convicted of crimes who are being given prison sentences is on the increase.

Which of the following, if true, most seriously weakens the argument?

A.      In Barraland the range of punishments that can be imposed instead of a prison sentence is wide.

B.      Over the last ten years, overcrowding in the prisons of Barraland has essentially been eliminated as a result of an ambitious program of prison construction.

C.      Ten years ago, Barraland reformed its criminal justice system, imposing longer minimum sentences for those crimes for which a prison sentence had long been mandatory.

D.     Barraland has been supervising convicts on parole more closely in recent years, with the result that parole violations have become significantly less frequent.

E.      The number of people in Barraland who feel that crime is on the increase is significantly greater now than it was five years ago.

答案为什么是C呢，我选了D,望nn指教

题目说是判刑的人多了

C说是之前判刑的人都是很长的刑期，所以要很久才能放出来，加上后来进来的犯人，所以人多了

D无关，假释犯在监督下犯法的情况变少

题目结论是：监狱人口增多是由于判决增多，而不是由于犯罪增多（因为犯罪减少了或者不变）。

问削弱，答案是C。用监狱人口增多是由于10年前延长了最短蹲监狱的时间反对了结论。

D是说犯罪减少（假释就好象绝望主妇里的CAROLS一样，被关在自己家里，但是有条警戒线^-^）,加强了结论

C是：有可能是由于犯罪增加（但是C没有加强这个原因来反对结论），不是由于判决入狱的增多（削弱了作者提出的新原因）

D不对，现在要削弱的是prision增加的原因不是由于判决人数增加，而是由于如C，使得原来短服刑期的人时间加长，出去的人少了，自然也就prision人就多了。

D是由于parole,导致犯罪少了，犯罪少了，监狱里的人也就少了。与题目中要求削弱的是原因，是不同的！！