Im not 100% sure but i think it is A.
Following World War 1, many countries felt that their punishment for participating in the war was unjust. The Soviets did not support the king's war effort and decided to do opposite of him, the Italians were unhappy that the Allies didn't give them what was promised. The Germans felt that their punishment was harsh and degrading, while Spain had a civil war in which the Fascists beat the Communists.
The answer would have to be that A. both empires were attacked by foreign invaders.
The chief result of U.S participation in World War 1 is, that the U.S forces ended the stalemate and let go an allied victory. The U.S was the force they needed
Answer: Jazz is a music genre that originated in the African-American communities of New Orleans, United States. It originated in the late 19th and early 20th centuries, and developed from roots in blues and ragtime. Jazz is seen by many as "America's classical music."
Hope this helps :)