A. Was a French diplomatic success

B. Gave Americans the Allied leadership role

C. made Germany weaker

D. increased the pressure on the Allies

I take it you mean The Great War (WWI as it became known)

D. increased the pressure on the Allies

Mate it's not that hard to write a fairly intelligent question. Delete this one and try again.

Think before you post

Jello i think you are drinking too heavy or just in a wrong place at a wrong time or maybe something wrong with your time machine?

your talking about WW1, then the answer is D, when the ruskies pulled out because of there communist revoultion,

A. Was a French diplomatic success

B. Gave Americans the Allied leadership role

C. made Germany weaker

D. increased the pressure on the Allies