How did nationalism impact world war 1 please help out

Nationalism was a particularly important cause of World War I due to several key factors. For instance, it caused nations to build up their armies and led to increased militarism. As well, it created extremely high tensions in Europe in the decades before the outbreak of the First World War.

Explanation:

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the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.