[求助] 请教800上一题

In 1973, a remote town first acquired television. Shortly before broadcasts began there, a study was made of children's behavior. A similar study in the same community, after two years of TV, showed that the aggression rate among children of this age had increased by 160%. The conclusion drawn was that TV plays an important role in generating aggressive behavior in children. A similar study, covering the same years, was made in two similar communities that had had television for decades. This study showed no change in the aggression rate from 1973 to 1975. The results of the second study:

A) suggest that the prevalence of violent themes in TV programming may be explained by the tendencies toward violence which are deeply-rooted in human nature.

B) indicate that different social groups may react quite differently to similar stimuli.

C) demonstrate that long-term exposure to TV has no more severe effects than short-term exposure.

D) support the conclusion drawn from the first study.

E) disprove the conclusion drawn from the first study.

Why the answer is D instead of E? 想不明白. 求助!!!

偶认为这道题目不严谨，你可以选E，也可以选D.　关键是第二个study的1973年的数字是电视有之前还是之后．文中没说，你也不能推出

1973年的数字应该是有电视之后的呀。题目中说 第二个community 已经装了电视for decades 了。

不过我认为D有问题。

我思路是： 第一个community 的孩子在看了2年电视后，voilent.  结论：电视的副作用。 要反驳的话，例子应该从另一个community 的孩子不看电视，就不violent 中来找。

而第二个community 的孩子一直看电视，其violence 的程度，2年内没有变化。偶认为不能说明任何问题。因为你不知道第二个community 的孩子从装电视到1973 violence 的程度变化。不知道起始状态就不能确定从1973年到1975年间的no changes. 表示的是no changes from non-vilence to vilence OR no changes from mild violence to strong violence. 故不支持任何结论。

大家讨论。

我一开始选C, 但后想想好象没有做long term 和 short term agression rate 之间的比较. 我同意选D, 因为

A similar study, covering the same years, was made in two similar communities that had had television for decades. This study showed no change in the aggression rate from 1973 to 1975. similar的communities的经验说明了除TV以外没有其他因素会造成aggression rate 的变化, 所以支持前一个结论关于电视对A RATE的判断