The correct option is D Introducing Volkswagen
Introducing people's car or the Volkswagen was a domestic policy. The rest of them are Hitler's foreign policies. Hitler had a winning streak not just in domestic policy but also in foreign policy. He withdrew from the League of Nations in 1933, occupied the Rhineland in 1936, and annexed Austria in 1938. He went on to annex German-speaking Sudetenland that was part of Czechoslovakia, and then the entire country.