The correct answer is B) France believed Germany would not invade or attack their nation.
The statement that properly explains the "Phony War" in 1940 is "France believed Germany would not invade or attack their nation.
In the end, France suffered the most as a result of World War II because most of the war was fought on its soil.
When Hitler sent his troops to invade Poland in September 1939, the immediate result was a declaration of war against Great Britain and France against Germany. Then, Hitler ordered to attack and invade France. After seven months of battle, Germany entered the French territory and the British had to leave. In those years of World War II, most of the war was fought on its soil creating so much destruction and damage in French towns and regions.