Growing nationalist ideas across the world contributed to the outbreak of World War One (WWI) in Region A. So, option (A) is the correct answer.
What is region A on the world map?
The 'Black Hand,' for example, planned to drive Austria-Hungary out of the Balkans and create The Greater Serbia.
With the assassination of Ferdinand in Sarajevo in June 1914, this enhanced strain of nationalism ushered in World War I.
Check out the link below to know more about WWI nationalists;
https://brainly.com/question/9281359
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