D. The enlightenment concepts
since the enlightenment had to do with believing with individualism and choosing your own goverment, having natural rights, ect. The declaration gave rights that the enlightenment said was needed
American discovered that they could grow their own food because of the native americans who taught them how when they arrived here .
Several factors came together. Europe had a population that was on average richer than most other cultures. A very competitive commercial class, ships that were superior than other cultures, developed for the rough North Atlantic, and a number of competitive states rather than a single empire.
I think the answer is the last one
The correct rule is "a person could not marry a person of lower social standing."
If you are born into a lower social class & became wealthier, had good behavior, owned more land, etc., it wouldn't change your position.
You are going to be stuck with the same social class your entire life, same thing would happen if your parents were in the lower social class & you became more successful, you would still be in the same class as your parents. You would work the jobs they worked & go through what they have to go through. Though I believe later on it was socially acceptable to marry to a lower class, but it was taboo.
Hopefully this helped of some sort!