Political advocacy groups have begun to use information services to disseminate information that is then accessed by the public via personal computer. Since many groups are thus able to bypass traditional news sources, whose reporting is selective, and to present their political views directly to the public, information services present a more balanced picture of the complexities of political issues than any traditional news source presents.

Which of the following is an assumption on which the argument above depends?
 

--------------------------------------------------------------------------------
A   Information services are accessible to enough people to ensure that political advocacy groups can use these services to reach as large a percentage of the public as they could through traditional news sources.
 
B   People could get a thorough understanding of a particular political issue by sorting through information provided by several traditional news sources, each with differing editorial biases
 
C   Information on political issues disseminated through information services does not come almost entirely from advocacy groups that share a single bias
 
D   Traditional news sources seldom report the views of political advocacy groups accurately
 
E   Most people who get information on political issues from newspapers and other traditional news sources can readily identify the editorial biases of those sources.

C,

如果通过informaion service的信息是完全来自具有单独偏见的团体，则信息会不平衡。

该题是ASSUMPTION.

前提:一些政治团体开始用互联网进行宣传,进而很多政治团体也用互联网宣传

结论:INTERNET比传统媒介为政治事件提供了更为平衡的信息.

所以ASSUMPTION应该是INTERNET的信息是多种多样的.D