Answer :
Answer: A. He was a German leader who supported Austria’s war with Serbia.
Explanation: German Kaiser (King) William II (1859 - 1941), and also the King of Prussia from 1888 to 1918 when he abdicated immediately before the German defeat in the First World War. He is known as one of the key figures who contributed to the beginning of the WWI, but without much influence during the war itself. He is known for his support of Austria Hungary in the event of an attack on Serbia and the subsequent Russian participation, Germany will help Austria Hungary in every possible way, even by entering the war.