Popular sovereignty is the idea that the people within a geographic territory should be able to make decisions about how they are represented or governed. The idea is to maintain the consent of the people through elected representatives. Therefore the notion of popular sovereignty is represented in the notion that "The people that live in a territory should choose whether to allow slavery or not."
The best description of popular sovereignty is that it allows the residents of a territory to make their own decisions about issues such as slavery. This principle was central to political debates in 19th century America, particularly regarding newly acquired territories. Therefore, the correct answer to the question is B: "The people that live in a territory should choose whether to allow slavery or not."
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