The group of people who occupied the majority of Austria in the year 1914 was Romanians. Hence, Option D is the correct answer.
<h3>Why did Romania declare conflict with Austria-Hungary?</h3>
Romania joined the conflict which will assert its claims on the Austrian, Hungarian, and Austrian territories where the Romanians were in the majority.
It become the cease of a countrywide challenge that successive Romanian governments had lengthy labored for. Transylvania becomes, in this context, extra vital than Bessarabia.
Hence, Option D is the correct answer.
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