The correct answer is D.
When the Rwandan genocide took place in the 1990s, around a million of Tutsi people were slaugthered in the streets all over the country, by member sof the other major ethnic group in Rwanda, the Hutus. The role of the main radio station in the country was very significant, as it was under Hutu power and it kept on encouraging Hutu people to murder their Tutsi neighbours during the whole time the genocide lasted and discouraging peace efforts. It was the main propaganda instrument used by the Hutu power.
Its effects were even more significant due to the predominant share of illiterate people in the country, who could not contrast the information they obtained from the radio and firmly believed what they heard.