Rock and roll influenced daily life, fashion, attitudes and language in a way few other social developments have equalled. As the original generations of rock and roll fans matured, the music became an accepted and deeply interwoven thread in popular culture. Beginning in the early 1950s, rock songs and acts began to be used in a few television commercials; within a decade this practice became widespread, and rock music also featured in film and television program soundtracks.
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The answer should be A or C
I believe it would be an operational definition.
Answer:
Quick, Easy to use cameras, self-timers, photographic film
Explanation:
- Photographic film is originally made by George Eastman and he called his first camera the Kodak (1888.)
- Slogan of his company is showing that those were easy to use cameras in those days. ''You press the button, we do the rest''
- Kodak and self-timer were sold separately and the people were able to order or buy a self-timer.