Radio didn't evolve as a mass medium until
A)receivers started using current instead of bulky,acid-leaking batteries
B)tuning the sets became relatively easy
C)stations developed broadcast programs intended for the general public
D)all of these
E)none of these

Question

Quizplus · Accepted Answer

All three factors contributed to the evolution of radio as a mass medium. The use of current instead of bulky batteries made radios more accessible and convenient for everyday use, while the development of broadcast programs for the general public provided content that appealed to a wider audience. Additionally, the ability to tune the sets easily made it simpler for people to find the stations they wanted to listen to.

Radio Didn't Evolve as a Mass Medium Until