Which was a cause of world war i?
a. political revolutions in europe left nations unstable.
b. the second industrial revolution led to international rivalries.
c. europe’s system of military alliances enlarged small conflicts.
d. russia’s race to industrialize threatened the economy of other european countries.

there is no chart here so no one can answer this.

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