So the answer for this is letter B
okay hold on, they wont let my answer go through so i'll post this and write it in the comments :)
Answer:
In a democracy, the main function of the media is to inform the people about everything that is of public interest, and to keep an eye on the branches of government: the president, the congress, and the judiciary.
Human rights violations are either caused by the government, or by other citizens (for example, a gang or a mafia cartel). In both cases, the media has the responsability to cast light on the cases, to inform them to the citizens, and to denounce them. This action is of great importance for democracy, because when human rights are violated, democracy is either in danger, or disappearing.
I believe the proper answer would be "Sentence 3".