Why Does Wade Describe the Practice of "Hooking Up" as a "Culture

Why does Wade describe the practice of "hooking up" as a "culture"?

A) It's a set of beliefs, practices, identities, norms, and modes of enforcement that influence not only those who hook up but also many others on college campuses.
B) It's practiced by people who've rejected the dominant culture to follow their own way of life.
C) Cultures, once adopted by individuals, remain a lasting part of their lives, distinguishing them always from others who don't share the same culture.
D) Its strangeness makes it an object of scorn and derision by cultural elites, often leading to penalties and even ostracism by the dominant society.