After the mongols conquered kiev, they created the , which ruled the western lands of the mongol empire. was allowed to become the most important city at this time because of its cooperation with the mongol rulers. in 1480, refused to pay tribute to the mongols any longer, an event that ended mongol rule in the region.

After the Mongols conquered Kiev, they created the Golden Horde, which ruled the western lands of the Mongol Empire. Moscow was allowed to become the most important city at this time because of its cooperation with the Mongol rulers. In 1480, Ivan III refused to pay tribute to the Mongols any longer, an event that ended Mongol rule in the region.

the answer is a. the declaration of independence.

answer; /// i believe that the correct answer is (d)the huang he river valley;