It is to be noted that the primary aim of "Sneaker Nation" by Julie Brantely is to educated readers about how " Our relationship with sneakers has changed over time." (Option C)
Sneakers have transformed from basic sporting footwear to cultural icons in the US.
Originally intended for athletics, they evolved into fashion statements that were adopted by a number of subcultures. These days, sneakers stand for trends, individuality, and self-expression.
Celebrities and artists work together with brands to create limited edition items that are highly sought after. Social media, which enables fans to share and exhibit their collections, is a major factor in the development of sneaker culture.
American culture's blending of sports, fashion, and individualism is reflected in the shoe boom.
Thus, the correct answer as far as the questions is concerned is Option C.