120. The proposal to hire 10 new police officers in Middletown is quite foolish. There is sufficient funding to pay the salaries of the new officers, but not the salaries 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 most seriously weaken the conclusion drawn above?

D. In most United States cities, not all arrests result in convictions and not all convictions result in prison terms.

This generalization is as true of Middletown as it is of any other American city, but it only states the obvious and does not weaken the conclusion about increased caseloads for the courts.

OG解释中这后半句怎么理解，为什么这个选项不对？？

D只说了拘留不一定就定罪,定罪了也不一定就坐牢.

解释说,D只表达了一个显而易见的道理,并没有削弱结论(结论说增加警员的数量会导致犯案数量的增多,从而法庭受理的案件增多)