CLEP US History II

Answer: D - The modern camera was developed in the 1820s, decades before the beginning of the Second Industrial Revolution, which was also called the Technological Revolution. The electric light, phonograph, radio, telephone, refrigerated railroad cars, airplanes, and automobiles were all creations of this period. It was the greatest period of change in transportation since the invention of the wheel, and it was similarly the greatest period of development in communication (on both a mass scale and person-to-person level) in human history, until the development of the Internet.