Among nineteenth-century European political movements, the one most responsible for triggering World War I was Group of answer choices socialism. conservatism. liberalism. nationalism.

nationalism

Explanation:

Nationalism became one of the major reasons that initiated the World War I. It ignited the level of greediness and to remain stiff among the people of the world. the countries were not in the condition of any negotiation with other countries regarding any terms. The feeling of Nationalism was used to emerge the hope of false hopes. It also made people become aggressive about the war and made them insensitive towards the people.

pls be more elaborate

i honesty don't know, good luck tho dawg