Triple

Target entity: Russo-Turkish War (1877–1878)
Context triple: [Eastern Crisis of 1875–1878, hasPart, Russo-Turkish War (1877–1878)]

• A. Russo-Turkish War (1828–1829)
  The Russo-Turkish War (1828–1829) was a major 19th-century conflict between the Russian Empire and the Ottoman Empire that further weakened Ottoman control in the Balkans and the Caucasus and advanced Russian influence in the region.
• B. Russo-Turkish War (1877–1878) campaigns chosen
  The Russo-Turkish War (1877–1878) campaigns were a series of major military operations between the Russian and Ottoman Empires that reshaped the political map of the Balkans and contributed significantly to the independence or autonomy of several Southeastern European states.
• C. Russo-Turkish War (1787–1792)
  The Russo-Turkish War (1787–1792) was a late 18th-century conflict between the Russian and Ottoman Empires that furthered Russian expansion and influence around the Black Sea and weakened Ottoman control in the region.
• D. Serbo-Bulgarian War
  The Serbo-Bulgarian War was a brief 1885 conflict in the Balkans between Serbia and the newly unified Bulgaria that helped establish Bulgaria’s military reputation and reshape regional power dynamics.
• E. Eastern Crisis of 1875–1878
  The Eastern Crisis of 1875–1878 was a series of Balkan uprisings and wars against Ottoman rule that triggered great-power intervention and reshaped the political map of Southeastern Europe.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.