AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) They were competing to extend their own control over the region while countering the influence of rival powers.
The textbook explicitly states that each major power — Russia, Germany, England, Austro-Hungary — was keen on countering the hold of other powers over the Balkans and extending its own control, driven by rivalry over trade, colonies, and military might. The other options are either historically inaccurate or not supported by the passage.