The answer is definitely C. The Midwestern United States is an example of a vernacular region. Indeed, the Midwestern has been generally acquainted and explained by both travelers and habitants quite mistakenly (most of them characterize the region as some little town and so on). Moreover, the vernacular element can also be found by paying attention to the emotional charges these people display while talking about the Midwestern (most of them knows everybody in town and they have still ongoing things with some of the city residents).