Why did the kingdoms of Ghana, Mali, and Songhai collapse? * A. They overextended the use of natural resources and suffered from natural diasters
B. They were subject to civil wars, wars against foreign rulers, and poor leadership
C. They converted to Islam and did not pay tribute to foreign rulers
D. The kingdoms split into factions ruled by warlords

B. They were subject to civil wars, wars against foreign rulers, and poor leadership

Explanation:

The kingdoms of Ghana, Mali, and Songhai collapsed as a result of long wars both external and internal, famine, famine and droughts and also poor leadership who failed to put proper structures in place to ensure a thriving economy.

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the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.