详解
Choice A is the best answer. The passage explains that although the major news organizations were once considered "trusted shapers" (line 29,"regarded...authoritative") of public knowledge, that perception is changing due to the "growing feeling...that the news media should be 'informative rather than authoritative'; the job of journalists should be to 'give the news as raw as it is, without putting their slant on it'; and people should be given 'sufficient information' from which 'we would be able to form opinions of our own'" (lines 70-77,"There...our own"). In other words, the audience now wants raw facts about the world, not facts constructed in support of a certain opinion.
Choice B is incorrect because the passage presents the public as wanting information without any slant on it, not as wanting only a limited amount of information. Choices C and D are incorrect because the passage does not specifically identify the public's feelings about including quotations from authorities in news stories or how they would want journalists to handle private details that the subjects of news stories do not want revealed.