Answer:
it would be c
Explanation:
I THINK
oh and please mark brainlist
The correct answer is Objective
The Principle of Military Objective requires that every
military operation should be directed toward a plainly well-defined and
practicable goal. This limits military actions to those objects which: by their
nature, location, purpose or use make an effective contribution to military
action
World war 1 broke out in 1914 because a group of Serbian nationalists (The Black Hand) assassinated the duke of Austria-Hungary. Austria -Hungary threatened Serbia with a bunch of wishes that they wanted Serbia to due for them. Due to the treaty between Serbia and Russia, Serbia said no. Germany, who had a treaty with Austria-Hungary threatened to attack if Russia mobilized its army. Russia did and Germany invaded Belgium. This brought Great Britain and France into the war.
