The slave owner did not have any manumission over his slaves
Because plants need sunlight to survive,and small mammals eat plants, and the tigers eat the small animals who eat the plants.
The fact that the constitution gave too much power to the federal government, and that the rights of the people were not guaranteed in the bill of rights.
It would be A. In the US Elections are indirect elections that are determined by the electoral collage.
A and B is out because these undoubtedly are unique Chinese achievements. So is D. The Chinese are infamous for these things. Other achievements include gunpowder, fireworks, ect.
C is basically the answer because the chinese aren't the only race or country to do so. Many people have done it in the past before them and present in the terms of civilization. It isn't simply uniquely or originally from them.