Answer:
B. Austria-Hungary, Serbia
Explanation:
It then sent Serbia an ultimatum, worded in a way that made acceptance unlikely. Serbia proposed arbitration to resolve the dispute, but Austria-Hungary instead declared war on July 28, 1914, exactly a month after Ferdinand's death.
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Answer:
C. Serbia, Austria-Hungary
Explanation:
It was suspected that serbia help the assassin via funding so austria felt angary towards serbia so austria send in impossible task to go to war with serbia
