I want to know the answer to the following question:
During what decade did rock and roll music first rise to popularity?
All the background I'm provided with is that "One big impetus for the development of the AC radio format was that, when rock and roll music first became popular in the mid-1950s, many more conservative radio stations wanted to continue to play current hit songs while shying away from rock.". Is that enough to answer the question?
Answer: yes