Answer: C) Established permanent American military bases in Europe.
Explanation:
The First World War began in 1914, and the United States joined the war three years late after Germany had breached its neutrality treaty with America. The influence of the United States entering the war was significant. The additional firepower, resources, and U.S. troops helped to balance the war in favour of the Allies. To this end, they also organized several military bases throughout Europe, thus assisting the Allies.
