The city on a hill, is the phrase was used by puritan leader john winthrop in 1630 through the first group of puritan emigrants was still on board their ship the arbella waiting to disembark and make the first settlement in what would become new england. The city unit of this sermon was dragged out by well beside readers as a crystallization of the puritan mission in the new world.
The circular flow model is one example or the best model demonstration of explaining or show the model of producers and consumers in how they influence one another using the system of free market. This simplifies and shows the process of how consumers and producers affect one another.
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The correct answer is going to be C