I believe the answer is the closing of the port.
Answer:
Serbia
Explanation:
Austria-Hungary declares war on Serbia. On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War
Answer:
D is the correct answer
Explanation:
Periodization is the categorizing the past in blocks of time for the study and analysis of the history and to understand the current and historical processes. Since history is continuous, no system of periodization is perfect and without periodization, the past is just scattered events. The period labels in history are not permanent, they are constantly challenged as discoveries happen and historical events come into the light.