B - Slave revolts.
The revolt of Spartacus, which was also the most famous slave uprising in the history of the Roman Empire, lead to questions about the usefulness and effectiveness of the current governmental system in Rome. This, along with other factors, made them plunge into a crisis which ended through the transition to an empire.
Gridlock, or deadlock, is a situation where there is a difficulty to pass laws that please people and their needs.
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I think that it would be A
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Answer: Slavery was a point of contention in the United States since the country's founding. The disagreement intensified as the 1800s began. In 1820, the Missouri Compromise established a boundary that wouldn't allow new slave states above this line. Dred Scott had been taken by his owner to an area in which slavery had been made illegal because of the Missouri Compromise.
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The People's Republic of China regards Taiwan as "one of its provinces," since China has always seen Taiwan as being both politically and economically advantageous.