Which of the Following Is True About the Pace of Changing

Multiple Choice

Which of the following is true about the pace of changing technology?

A) It took less than 4 years for radio to reach 50 million listeners.
B) TV was able to capture 50 million viewers in only 13 years.
C) Until 500 years ago, written language didn't exist.
D) Pocket-sized telephones were introduced in the first half of the 1900's in a burst of communication technology.