Im not sure but C makes more sense in that diagram
Answer:
The factors that contributed to the outbreak of World War I
Explanation:
The reason for the outbreak of World War I was European countries as they began to form alliances with other countries after the assassination of the heir of Austria-Hungary Archduke Franz Ferdinand. Imperialism, Militarism, alliances, and Nationalism were the cause of the war. The growing desire and competition in Europe led to an increase in disputes that helped push them into WWI.
European nations suffered massive casualties in the wars because of advanced technology and weapons such as machines guns, submarines, planes, tanks, grenades, chemical weapons, etc.
Competition,and more money
Generally speaking, a key development that occurred globally during the classical era was "<span>D. The expansion of cultural exchange through regional trade", since this was a time of cultural and technological diffusion. </span>