Correct answer: A. The state used propaganda to control public thinking
Explanation: In Nazi Germany, propaganda was an organised instrument of state power. The government controlled newspapers, radio, films, posters, education, and public ceremonies so that citizens repeatedly encountered messages praising Hitler, the nation, militarism, and racial ideology. At the same time, criticism and alternative viewpoints were censored or punished. Thus propaganda did more than advertise a policy: it shaped what people were encouraged to believe and whom they were taught to hate. Option A is correct. Options B, C, and D are opposite to the historical reality because the Nazi state did not suppress propaganda, preserve independent media, or permit equal access for opposing ideas.