Answer:
Where is the space? Were people litter and do bad things
Explanation:
<span>Shifts </span>between<span> cautious cooperation and often bitter superpower rivalry over the years. </span>
They helped with supplies
No, it is false that the Xiongnu became the direct ancestors of the Mongols, who ruled China up to World War I, since these were a nomadic people, and the leadership in China by then was in different hands.