A) Which of the following was one effect of the failure of Germany's Schlieffen Plan to quickly defeat France? (1 point)

A.Germany had to fight the war on both the Eastem and the Western Front

B.Germany had to make an alliance with France

C.Germany was able to concentrate only on the Eastern Front.

D.Germany was not able to bring Austria-Hungary into the war as its ally.

A) Germany had to fight the war on both the Eastern and the Western Front.

The correct answer is A) Germany had to fight the war on both the Eastern and the Western Front.

To determine the correct answer, let's analyze the options given:

A) Germany had to fight the war on both the Eastern and the Western Front.
B) Germany had to make an alliance with France.
C) Germany was able to concentrate only on the Eastern Front.
D) Germany was not able to bring Austria-Hungary into the war as its ally.

To find the answer, we need to understand the effect that the failure of Germany's Schlieffen Plan had on Germany's military strategy.

The Schlieffen Plan was a German military strategy devised before World War I, with the goal of quickly defeating France by quickly invading through neutral Belgium and encircling the French Army. However, the plan failed for multiple reasons, including stronger resistance from the Belgian and French armies.

From this information, we can eliminate options B and D. Germany would not have made an alliance with France since they were enemies, and Austria-Hungary was already Germany's ally before the war started.

Now let's consider options A and C. After the failure of the Schlieffen Plan, Germany had to divert its forces to fight on both the Eastern and Western Fronts. This was because France was not quickly defeated and was able to launch a counter-offensive, resulting in a stalemate on the Western Front. At the same time, Germany had to face Russia on the Eastern Front.

Considering this, the correct answer is A) Germany had to fight the war on both the Eastern and the Western Front.