What was one effect of the growing popularity of radio in the 1920s?%0D%0A%0D%0AA. %0D%0AJob opportunities in the growing radio industry led to increased migration to northern cities.%0D%0A%0D%0A%0D%0AB. %0D%0AAfrican American culture spread, which helped the civil rights movement gain supporters.%0D%0A%0D%0A%0D%0AC. %0D%0AAdvertisers reached more Americans than before, which led to the growth of consumer culture.%0D%0A%0D%0A%0D%0AD. %0D%0AAmericans became more culturally divided because radio broadcasts could only reach small areas.

C. Advertisers reached more Americans than before, which led to the growth of consumer culture.