I want to know the answer to the following question:
Who have hot AC format radio stations had to change the music they play?
All the background I'm provided with is that "With the mixture of radio friendly AC tunes with some rock and pop fare also landing on the pop charts, mainstream songs won over many critics in the need to define AC, and appeared to change the tolerance and acceptance of AC music into mainstream day to day radio play.". Is that enough to answer the question?
Answer: no