C: city upon a hill
Winthrop referred to the Puritan colony as a "city upon a hill" referencing the importance of the colony in being a model for others in how to run a colony and behavior in a pure way.
This quote has remained important in US history and has come to be the goal of the whole country. This thinking that the US is a model for others has been referred to by Presidents and leaders to express the importance of US actions to the world. Ronald Reagan is most famous for using the quote to express the importance of US leadership during the 1980's and the fight against communism.