According to Map 21

According to Map 21.1: Europe in 1815, why was the Austrian Empire able to maintain order in most of Europe between 1815 and 1848?

A) Bordering as it did on both the Russian and the Ottoman Empires, it was well positioned to exert control over two empires that were hostile to one another.
B) With significant territories on the Italian peninsula and a commanding position within the German Confederation, the Austrian Empire was able to suppress the interest in reform and change in the areas closest to itself.
C) Owing to its large size, the Austrian Empire was able to influence the actions of the Kingdom of Prussia, thus holding a greater position within the German Confederation.
D) Although it acquired far-reaching territory, the Austrian Empire was able to implement the German language in all previously non-German-speaking lands.