Why did the Ming dynasty need to rebuild the Great Wall of China, rather than continue to use the wall built by the Qin dynasty and its early successors?
AThe old wall had fallen into disrepair.
BThe old wall had been demolished during the Yuan dynasty.
CThe old wall had sunk below rising sea levels.
DThe old wall protected only the southern border.
AThe old wall had fallen into disrepair.
BThe old wall had been demolished during the Yuan dynasty.
CThe old wall had sunk below rising sea levels.
DThe old wall protected only the southern border.