I believe it’s B. The city served as the epicenter
I hope that helped
The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
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Explanation:
the first question the answer is c and the difference of a and b is a is by a lake and b is by a creek the rest i don't know sorry
