Answer:
He designed a plan for a series of interconnecting canals.
Explanation:
Emperor Yangdi helped to unite people in China by building a vast network of interconnecting canals. The constructing of the Grand Canal connected the northern and southern regions in China. Through the canal, people were able to connect from the far region and transport goods to the capital and other places. It was also used for supplying food to the northern border armies with food from the south.
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Islam would be the oldest
Civil rights, because in 1968 martin luther king was killed