What innovation in the early 20th century started a new age of communication?

Question

Quizplus · Accepted Answer

The introduction of broadcast radio and TV revolutionized communication in the early 20th century, allowing for mass communication and entertainment on a national and even global scale. This innovation paved the way for future developments in television and radio technology and set the stage for the digital age of communication. The other options listed were important developments in their own right, but did not have the same transformative impact as broadcast radio and TV.

What Innovation in the Early 20th Century Started a New