Final answer:
The support for German annexation in Austria can be attributed to the influence of Austrian Nazis, favorable response to Nazi propaganda, lack of foreign response, and perceived benefits of joining Germany.
Step-by-step explanation:
The support for German annexation in Austria can be attributed to several factors. One reason is the influence of Austrian Nazis and the German army, who used fraud and intimidation to ensure compliance. Another reason is the favorable response that Nazi propaganda found in Austria, which created a sense of nationalism and a desire to be part of a unified German-speaking nation. Additionally, the lack of foreign response and the perceived benefits of joining Germany, such as economic opportunities, also contributed to the support for annexation.