<span>adopting the gold standard opened the country to foreign investment</span>
A. because if this wasn't true we wouldnt have had a war based off our freedom.The revolutionary war
They contributed to World War 1 through the assassination of Archduke Franz Ferdinand. The Black Hand was part of a Pan-Slavist movement in which they wanted to unite territories of South Slave that had been annexed by Austria-Hungry. Hopefully this helps.
The option which explains one way in which the Byzantine Empire continued the cultural traditions of the Romans is the second one - by using Latin as the primary written language, at least until the 7th century when they started using Greek.
A is a weird option - how can adapting Greek ideas be a continuation of Roman traditions? C is insulting. D is incorrect as Byzantine Empire didn't have gladiators.