The group of people who occupied the majority of Austria in the year 1914 was Romanians. Hence, Option D is the correct answer.
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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