Why were the Mongols able to easily conquer China?

Explanation:

Combination of training, tactics, discipline, intelligence and constantly adapting new tactics gave the Mongol army strength. They established their Mongol armies upon the last rulers of China and conquered the land.

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this forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea. the terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.

the answer is c. hope is