What are the four actions of germany that lead to the european tension to the point of breaking?

The points are the following:

Germany and Serbia had a dispute over the railroad constructed by Germany.

The expansion of the German Navy.

The cruel treatment of Kaiser Wilhelm.

Because of these events, the relationship of Germany and the other European countries had caused tension thus became the reason why the war had broke up

c]extended voting rights to african americans

fearing kabuki could corrupt the nation’s morals, japanese government officials

explanation:

the national morals was so the japanese and the kabuki would stop fighting