Which best characterizes the major differences between 1 9 4 8 and 1 9 5 8 in the radio broadcast industry?
a.In 1948, a few large networks mostly featured live music; in 195/b ar ( 8 ) , numerous smaller radio stations were devoted to promoting records.
b.In 1948 black "crooners" were considered race music; in 1958 , the same group was considered 'morally suspect' RÅₐ .
c.In 1948 , small - time musicians eschewed elite radio producers; in 1958 , small - time radio producers eschewed the elite musicians.
d. In 1948,radio was the dominant mass media form; in 1958 it was eclipsed by TV.