Question

Why was quickly defeating France a key element of Germany's military strategy before World War I?

Answer 1

A and c are not correct and Germany didn't have an alliance with France so the answer is B

Answer 2

Answer:

B.

It needed to defeat France on the Western front before Russia could prepare to attack on the Eastern front.

Explanation:

Russia was allied with France and Austria-Hungary was allied with Germany. The Germans needed to help Austria-Hungary, but they needed to defeat France before doing so, otherwise they would be facing a two-front war.