Answer:
C) Television
Step-by-step explanation:
The main means of mass communication of the twentieth century was television.
The emergence of televisions dates back to the 1920s when researcher John L. Baird joined electronic components that had just been produced in various parts of the world and built the first prototype television. A satisfactory reproduction of images occurred only 5 years after this experiment.
Still in the 1920s, Russian Wladimir Zworykin created and patented the ionoscope, from which the first television tubes were produced, being popularized and marketed industrial scale from 1945 onwards. Thus, in the 1950s televisions became popular, revolutionizing the way Americans accessed information and entertainment.