Answer:
c. Poland.
Step-by-step explanation:
Through the mediation of the Italian dictator Benito Mussolini and at the initiative of Hermann Göring, the British Prime Minister, Arthur Neville Chamberlain, and his French counterpart, Édouard Daladier, approved the incorporation of the Sudeten (belonging to Czechoslovakia) to Germany, because the largest part of its inhabitants was German-speaking. It was known as the Munich Agreement and no representative of Czechoslovakia was present. The United Kingdom and France were pleased with the wishes of the German population of the Sudeten and considered this agreement as a partial revision of the Treaty of Versailles. Especially it was intended to avoid a new war, despite putting the existence of Czechoslovakia in great danger.
However, shortly after this agreement, the German invasion of Poland took place. It was a military action of Nazi Germany aimed at annexing the Polish territory. The technical operation, known as the "Fall Weiss", began on September 1, 1939, and the last units of the Polish army surrendered on October 6 of that year. It was the trigger for World War II in Europe and ended the Second Polish Republic.
The invasion of Poland was the first of the military aggressions that Hitler's Germany would undertake. The Polish army was easily defeated, unable to cope with the top German troops who were using their famous technique called blitzkrieg (‘lightning war’), based on the rapid movement of armored vehicles and maximum brutally applied firepower. However, the fall of Poland would be accelerated by the subsequent invasion by the Soviet Union on September 17 and the absence of help from its allies, the United Kingdom and France.