The correct answer is A) Nationalism.
The term that best describes Hitler's belief in the superiority of the German race is Nationalism.
Adolph Hitler was the leader of the Nazi party that ruled Germany in times of World War II. He became the leader of Germany in 1933, after the failure of the Weimar Republic.
Since he was a young man, Adolph Hitler developed nationalistic sentiments and antisemitic sentiments that made him believe in the superiority of the Aryan race. He thought that Germans were a superior race and Jewish people, an inferior race. That is how he started the Jewish persecution and the Holocaust during World War II times.
