Which of the following best summarizes what happened on D-Day? A) The Allies cooperated with the Germans to invade France for what was the most effective invasion in history.

B)The Allies secretly invaded Russia to push the Germans back, and after days of brutal battles, Germany was forced to surrender.

C) In a surprise attack, the Allies invaded France, significantly pushing back the Germans and ultimately contributing to their downfall.

D) The Allies names FDR as general of the Allied forces.