Answer:
The correct answer is that the assassination of Archduke Franz Ferdinand led to the outbreak of war in Europe because the death of Franz and his wife led to many more fights between the alliances.However as well, many of the allies of them wanted to get revenged to the killers of the couple.
Step-by-step explanation:
The consequences of their death became known as the "War to end all wars and leding to World War I".