I am sure it is B. War, I had this question on my test and I got it right. If you get it wrong so sorry. But if helped mark me the brainiest!!
The Americans had won and they became allies with France. Also they felt victorious.
Answer:
Germany declared war on Russia because they wanted to also declare war on the French. In an audacious move called the Schlieffen Plan Germany had to attack Russia to delay the progress of their steam rail expansion then while the Russians are distracted attack France. Germany knew for certain if they allowed Russia to complete their rail connections the Russian with their superior numbers would overrun them.
Explanation:
