The sentence that explains the limits of the media's influence on public attitudes about politics is C) "People generally watch, listen, and read sources that agree with their own viewpoints".
Although media is sometimes capable of shaping the public's political views and has the power to encourage political discussion, it is undeniable that people generally choose to read newspapers or watch television news programmes that show support to the specific political party they are going to vote for, such as the governing party or the opposition. Furthermore, more and more people decide to pay exclusive attention to these sources due to the fact that information is presented in a less objective way day by day, which is also closely connected to media bias and the judgements involved in the selection of events and stories that are reported.