本月CR JJ一题答案一直争议

5.   Approximately 5,000 people who have been convicted of nonviolent crimes in the state have been given community-service sentences instead of prison sentences. These offenders perform services cmmensurate with their training and skills from scrubbing floors to conducting research for the state. The community-service program, which began in 1979, has grown immensely as a result of drunken-driver legislation enacted a few months ago.
The introduction of the community-service program in 1979 was most probably prompted by which of the following, all of which occurred during the 1970's?                                                                                                                             

A. A decrease in the number of violent crimes in the state
B. An increase in the number of crimes committed by employees of the state
C. A gradual decrease in the median age of judges in the state
D. The overcrowding of the prisons in the state
E. The passage of drunken-driver legislation in other states

一直再争议是B还是D，大家怎么看？我倾向于选D，因为的employee原文里没有的。最perfect的答案应该是：由于dunken-driver被抓起来后，使得prison overcrowded了

我认为答案是 D。  但是，原因是:由于the overcrowding of the prisons in the state,所以，在 drunken-driver legislation enacted a few months ago, 被抓的 drunken-driver 这种 nonviolent crimes 不得不 be sentenced to community-service.  从而导致， The community-service program, which began in 1979, has grown immensely

我选B，原文是问：community-service program 最可能是因为70年代的哪个事情而被提出的。

题目告诉我们，那个什么legislation颁布以后，酒后驾驶也要被sentence了，即司机的犯罪率升高，而这些司机都是with their training and skills的，所以c-s program has grown immensely，要不这些“人才”就浪费了；这恰与B选项中的employee(这些人也是有their training and skills的)的犯罪率增加对应。

FYI

给出的“事实”是：The community-service program, which began in 1979, 也就是说：1979年已经开始了 community-service program.  后边给出的另外一个现象是：这个 program has grown immensely as a result of drunken-driver legislation enacted a few months ago.  也就是“几个月前开始的酒后驾驶的法律让这个community-service 的数量极大的增加了。

但是，要问的问题是：“下边提到发生于七十年代的原因中那个最可能引发引进cummunity-service program的必要？”

题目首先告诉大家communitry-service program 已经存在，几个月前实施的drunken-driver legislation 只是使这个program 更加普遍和深入。但是，导致 1979年开始这个 program 的原因 最可能是什么呢？那就是监狱人满为患。由于监狱人满为患，于是nonviolent crimes 就不往监狱里边放了，而是让他们去做社区义工。drunken-driver 属于nonviolent crimes 的一种