Question

why did a conflict develop between serbia and austria - hungary in the years leading up to world war i?
a. austro - hungarians began a campaign of genocide against serbs in their territory.
b. austro - hungarian nationalists assassinated the leader of serbias ruling political party.
c. serbian military forces joined the ottoman empire in its attacks against austria - hungary.
d. serbians believed that austro - hungarian lands with large serb populations should join serbia.

Explanation:

Serbian nationalism aimed to unite all Serbs. Austria - Hungary had regions with significant Serb populations. Serbian nationalists believed these regions should be part of Serbia, which led to tensions.
Option A is incorrect as there was no such genocide campaign. Option B is wrong because it was a Serbian nationalist (Gavrilo Princip) who assassinated Archduke Franz Ferdinand (an Austro - Hungarian), not the other way around for a Serbian political party leader. Option C is incorrect as Serbia was not allied with the Ottoman Empire in attacks on Austria - Hungary at that time.

Answer:

D. Serbians believed that Austro - Hungarian lands with large Serb populations should join Serbia.