Social Studies Test - Continues
3) 
This question refers to the passage and the chart.
In the late 1800s and the early 1900s, instability dominated Europe. In response to political and ethnic upheavals, many European nations entered into alliances with one another. At the same time, European countries embraced militarism, or the belief in large armies. The system of alliances, combined with militarism, quickly led to World War I when a crisis occurred in late June of 1914.
According to the passage and the chart, which value prompted the outbreak of World War I?