What does the author say about mass audiences?
A.They have little influence on communication in the 20th century.
B.They have gone out of business.
C.They get information about gardening and psychology from radio.
D. They have shifted their attention from magazines to television.
A.They have little influence on communication in the 20th century.
B.They have gone out of business.
C.They get information about gardening and psychology from radio.
D. They have shifted their attention from magazines to television.
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