The French Navy most directly helped the Americans during the Revolutionary War. So the answer would be France.
Because door of world is open for all..
and so U.S entered WW1
While the perpetrator still remains unknown, the US blamed Spain for the explosion, as relations between the two countries were strained over how Spain was mistreating it's colonies in Cuba. This led to the Spanish-American War, which was a US victory that led to the takeover of the Philippines and Cuba from Spain.
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The answer would be B because it was the beginning of the Napolenic Wars and the fall of the Bastille.