The idea behind the statement was that people in the south didn't like slavery much but they thought that it had to be done. For many of them it was true because they had large areas of land that were covered in crops, and the economy was thriving because the people who worked on that land were slaves. If it hadn't been for free work force, the economy would've failed for them and they'd lose everything. They believed that slavery therefore had to exist because someone has to keep the world spinning according to what they believed was right.
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Answer: D
It allowed sailors to know their direction.
Explanation: its obviously not any of the others and compasses tell direction
C. wanted to establish a French Republic.
The radicals in France wanted to overthrow the monarchy and establish a republic form of government to mimic that of the United States.
Moderates believed a republic was too far of a leap for a country with the tradition of monarchy. They wanted to create a parliamentary system like Great Britain that would maintain a monarchy and have representation. Conservatives wanted to maintain the monarchy and as a result were often the target of the radical government. Robespierre and the Jacobins launched a government meant to be a republic which turned into a dictatorship filled with bloodshed at the blade of the guillotine.