临时抱佛脚来问个逻辑10套里的问题

shangshanyi

5. Adelle: The government's program to reduce the unemployment rate in the province of Carthena by encouraging job creation has failed, since the rate there has not changed appreciably since the program began a year ago.
Fran: But the unemployment rate in Carthena had been rising for three years before the program began, so the program is helping.
Which of the following, if true, most strongly counters Fran's objection to Adelle's argument?
(A) The government is advised by expert economists, some of whom specialize in employment issues.
(B) The unemployment rate in the province of Carthena has historically been higher than that of the country as
whole.
(C) The current government was elected by a wide margin, because of its promises to reduce the unemployment rate in Carthena.
(D) Around the time the government program began, large numbers of unemployed Carthena residents began leaving the province to look for work elsewhere.
(E) The unemployment rate in Carthena had been relatively stable until shortly before the current government took office.

我觉得D和E都能证明，可是答案是选D，但是E我觉得更直接能证明。盼解疑！
另外我这属于考前不到10天才来专门弄逻辑，求问这10套卷如果认真做了，是否够了呢。没有其他方面的资料，可以提高做逻辑的速度。

奥特曼打GRE

他们讨论的是program开始前3年和开始后1年的情况，和government什么时候took office没有关系。而且讨论的是reduce unemployment的program是否有效，而不是unemployment是不是由government上任造成的。要反驳Fran，只需要说明program对控制unemployment确实无效就可以了。D就是说明unemployment从上升到平稳不变并不是由program造成的。