Aqueduct is that canal. I'd choose none of the above as the aqueducts was firstly built in ancient Rome. But there's no such option. So the closest option is the first one A.Greeks
They used them by having the Indians work and change religions
The correct answer is B: Foreigners would bring gifts for the emperor.
Further Explanation:
The tribute system was used by the Chinese for foreigners to gain access to passage across their lands. The foreigners would send a delegate ahead of the travelers and give gifts to the Chinese Emperor that were very valuable from their home countries.
After the gifts were given, they could pass and be allowed to trade in China's market. The Emperor would then return a gift to the foreigners or a "bestowel" that was equal or more valuable than the original gift the foreigners had given to enter China.
Learn more about the Tribute System at brainly.com/question/10578929
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Jim Crow laws were designed to keep whites and blacks segregated.
Because its the outer-rim of the earth, if it was inside, it'll be safer
