The event most closely associated with the start of World War II in Europe is:
B. Invasion of Poland by Nazi Forces
This event occurred on September 1, 1939, when Nazi Germany, under the leadership of Adolf Hitler, invaded Poland. This aggressive act led to the declaration of war by Britain and France against Germany, marking the beginning of World War II in Europe. The invasion of Poland is considered the primary trigger that escalated tensions into a full-scale global conflict.
