how did world war i change after the united states became involved?
How did World War I change after the United States became involved? A. The war was a stalemate before the United States became involved. After the United States became involved, the balance tipped to the Allied powers. B. The war was fought with outdated weapons before the United States became involved. After the United States became involved, modern weapons were used. C. The war was fought in No Man's Land before the United States became involved. After the United States became involved, fighting moved to the trenches. D. The war was fought mostly in Russia before the United States became involved.