Which events sparked world war i? check all that apply. the assassination of archduke franz ferdinand angered austria. serbia declared war on austria, which caused austria’s allies to go to war. nationalism increased tensions in the balkan peninsula. russia's mobilization plan called for an invasion of france through belgium. alliances caused a chain of events that pulled each country into war.

Let's look at all the options:
The assassination of Archduke Franz Ferdinand angered Austria.
-this is correct! This assassination happened in Sarajevo.

Serbia declared war on Austria,which caused Austria’s allies to go to war
This is false: the opposite is true; Austria declared war on Serbia, and then Serbia's Ally, Russia joined the war

Nationalism increased tensions in the Balkan peninsula.
This is true. Because of this a conflict could be foreseen.

 Russia's mobilization plan called for an invasion of France through Belgium.
This is false- not Russia, but Germany had such a plan.

 
Alliances caused a chain of events that pulled each country into war.
Very true!

The two alliences were Austria-Germany-Italy and Russia-France-UK