The immediate cause of World War 1 is the assassination of Archduke Franz Ferdinand of Austria-Hungary.
It was the last battle that led to the end of the American Revolution :)
I believe the answer is D
Born into Spanish nobility, Juan Ponce de León (1460-1521) may have accompanied Christopher Columbus on his 1493 voyage to the New World. A decade later, he was serving as governor of the eastern province of Hispaniola when he decided to explore a nearby island, which became Puerto Rico.
