Question

Which of the following was a MAIN cause of World War I?

Answer 1

The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... When Russia began to mobilize due to its alliance with Serbia, Germany declared war on Russia.

Answer 2

Answer:

militarism

Explanation:

Basically, militarism, a country's glorifying of its own military, can cause countries to become arrogant and power-hungry, as well as competitive for such power.