What was one of the causes of the increasing European tension prior to World War I?

France's unification and the balance of power in Europe

The major arms race driven by militarism in Europe

The presence of anciently-formed empires and desire for more conquests

Germany's unification with Italy and the broad shift in fortunes

The major arms race driven by militarism in Europe

Explanation:

The outbreak of the First World War in 1914 was due to militarism

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uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs