Question

read the passage.
teenagers became a distinct cultural group through market forces after world war ii. before the 1940s, the term \teenager\ itself was barely used in american society. advertisers first popularized the term when they identified people aged thirteen to eighteen as a unique demographic with specific consumer preferences and cultural needs. while early signs of youth culture appeared in the 1920s, the great depression and world war ii delayed its development, as young americans had to take on adult roles in their families and workplaces.
the postwar economic boom allowed teenagers to build their own identity through new forms of entertainment, from rock and roll to television shows. this shift reached literature in the late 1960s with works like s.e. hintons the outsiders and robert lipsytes the contender, which changed how authors wrote for young readers. while books for adolescents had existed previously, they often presented sanitized, formulaic narratives that teenagers themselves criticized as unrealistic. the success of these more authentic narratives shaped what would become the modern young adult genre, demonstrating how teenage readers demands could reshape literary markets.
which of the following inferences is best supported by the details in the passage?
given that there were early signs of youth culture in the 1920s before being interrupted by historical events, the teenage experience in the 1950s likely closely resembled the teen culture of the 1920s.
given that teenagers built their own identities through entertainment made specifically for them, there were likely few adults in that period who were interested in new forms of entertainment.
given that early novels aimed at adolescents were more sanitized and formulaic than later young adult novels, it is likely teenagers from that time preferred idealistic qualities in their literature.
given that advertisers first identified teenagers as a distinct group with unique consumer needs, marketing teams likely played a key role in establishing teenage identity as distinct from adult culture.

Explanation:

The passage states advertisers identified teens as unique, implying marketing's role in shaping teen identity.

Answer:

D. Given that advertisers first identified teenagers as a distinct group with unique consumer needs, marketing teams likely played a key role in establishing teenage identity as distinct from adult culture.