The answer is A
Because a legend could be many things, but not disease related, the flu is a disease, and the Columbian Exchange was when Christopher Columbus brought things from the americas back to Europe and brought things from Europe back to the Americas
With this, Napoleon meant that the history of Rome repeats itself since then. Rome's rose as the most powerful empire of the western civilization, but in the end all that rise must fall. The same happened with the empire Napoleon built, and the empires the colonist nations built (England, France, Spain).
It brought people together for friendly competition and as a distraction it provided a new means of entertainment that all could enjoy
They started to get more profit and more people from others countries traded many differnt stuff for the farming and other stuff they had.