invasion of Czechoslovakia by the Germans was with armed force. With Austria the German forces merely crossed the border of Austria without firing a shot and annexed Austria.........

After the German occupation of Czechoslovakia in 1939, he could no longer pretend impartiality and began to educate the American public about the menace of fascism. Even though he asked Congress to rescind the Neutrality Acts, they refused... therefore making the answer A.

czechoslovakia had a large ethnically german population

The Sudetenland was an area in western Czechoslovakia (as it was then) which was German speaking and had some sympathy with German nationalism

German National Socialist Workers' Party - Czechoslovakia - was created in 1919.