Genghis khan expanded the mongol empire by?

Genghis Khan, also advanced the Mongol Empire in other ways. He decreed the adoption of the Uyghur script as the Mongol Empire's writing system. He also practised meritocracy and encouraged religious tolerance in the Mongol Empire, unifying the nomadic tribes of Northeast Asia.

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D.

Explanation:

If you have Ap3x then D is the correct answer