The Byzantine had a good harbor that was hard to infiltrate. Also, they were a hub of trading.
A, the working class expanded
C. End of a religious division in Europe
The entire war was based on two "factions" of religion battling each other so C is an obvious answer
Britain, France, Ireland and Russia were part of an alliance called the Triple Entente, while Germany aligned itself with Austria-Hungary – known as the Central Powers. The assassination of Archduke Franz Ferdinand in Sarajevo on 28th June 1914, it triggered a chain of events that resulted in World War 1
