I believe the answer would be the last option. A resource has value, and people are willing to pay for it most likely because the resource is scarce. When a resource is not enough or the supply is low as compared to its demand, then most likely that price or value of it would increase.
They wanted America to be a free country, so they encouraged people to come here for a fresh start. They wanted them to be able to be fre in what they chose to do.
People still follow this because there are people today who come here to do exactly that.
Yes, I believe that we need to have political parties in United States because the people can choose between who they want to vote for and everybody doesn’t have to have the same opinion for people can I have their own, and can act on it.