What was the effect of the system of European military alliances that developed in the period prior to 1914? It brought nations closer together and improved their understanding of one another’s problems.

It divided Europe into two camps, but initially kept the peace.

It slowed the buildup of armies and weapons.

It created an opportunity to share the development of modern weaponry.

first paragraph (and busy all the night ,with a silence deep and white )

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

hope this