It Can Be Argued That This Key Decision Early in the War

It can be argued that this key decision early in the war by Adolf Hitler made the defeat of Germany inevitable:

A) abandoning the Battle of Britain.
B) dividing France into a zone of German occupation and a French national puppet government at Vichy.
C) immediately declaring war on the United States after the Japanese attack on Pearl Harbor.
D) snubbing British proposals for an armistice in 1941.
E) invading Scandinavia.