2. Why did the assassination of
Archduke Franz Ferdinand lead to
fighting?

The political reason for the assassination was to break off Austria-Hungary's South Slav provinces so they could be combined into a new country, Yugoslavia. This led to the outbreak of war in Europe at the end of July 1914. Austria-Hungary declared war on Serbia.

i think its the outcome of people's preferences.

peasants’ war, (1524–25) peasant uprising in germany inspired by changes brought by the reformation, peasants in western and southern germany invoked   divine law to demand agrarian rights and freedom from oppression by nobles and landlords. as the uprising spread, some peasant groups organized armies. although the revolt was supported huldrych zwingli and thomas müntzerits condemnation by martain luther contributed to its defeat, principally by the army of the swabian league. some 100,000 peasants were killed. reprisals and increased restrictions discouraged further attempts to improve the peasants’ plight.

i think it would be " a" i might be wrong tho