It just says a quarter of all white people were members of slave owning families in Russia, and says "only 2% of slaves worked on plantation where more than a hundred slaves worked" in the south U.S.
I thought C could contradict then...How can we use it as a principle?
Though the % may be smaller in the U.S, the total number might be bigger.
Then, the number of rebellion (of the one with more than a hundred slaves) in the U.S might be more or less than Russian's dependion on the number (which would contradict the last sentence maybe...)
Or is the last sentence telling the absolute number in the U.S. is smaller as well?
Or instead...the last sentence's "plantation" and "estate" are actually not specified as the one with more than a hundred slaves, so that's why C would work as a principle?
Also...
The differences are mainly talked in the last paragraph, but does it talk about "different kinds" as the last sentence of the 1st paragraph says? I think the last paragraph just mentions which is more common, so I thought the kind is the same, but just number is different...
What did I miss?

Thank you