Answer:
The correct answer is B. D-Day was the first step in the Allied liberation of France.
Step-by-step explanation:
D-Day, formally codenamed Operation Overlord, was the name for the invasion by Western Allies in Western Europe occupied by Germany. Operation Overlord began on June 6, 1944 with the largest amphibious invasion in history. It was the start of the liberation of Western Europe. In Eastern Europe the Germans were already losing the Soviet Union and two days before that, Rome had been conquered by the Allies.
The operation started with airborne landings and a massive amphibious assault in the early morning of June 6. After landing, the first attempt was to preserve and expand the Norman bridgehead. Various operations were undertaken for this purpose and during Operation Cobra the Allies broke through the German lines definitively.