The proposal to hire 10 new police officers in Middletown is quite foolish. There is wufficient funding to pay the salaries of the new offices, but not the salaties of additional court and prison employees to process the increased caseload of arrests and convictions that new officers usually generate. Which of the following, if true, will seriously weaken the conclusion drawn above? a, Studies have shown that an increase in a city's police force does not neccessarily reduce crime. b, When one major city increased its police force by 19 percent last year, there were 40 percent more arrests and 13 percent more convictions. c, If funding for the nes police offices' salaries is approved, support for other city services will have to be reduced during the next fiscal year. d, In most US cities, not all arrests result in convictions, and not all convictions result in prison terms. e, Middletown's ratio of police officers to citizens has reached a level at which an increase in the number of officers will have a deterrnt effect on crime. 答案是：E 我选了D，我觉得E中的ratio好像没什么用吧，为什么到了一定的level，crime就能得到抑制呢，题目中不是说，officers越多，crime就越多吗？？ 自己实在是想不明白，请各位大虾帮帮忙！！！谢谢！！！ | 
