I would say A. Advertisers tend to target their ads at a certain age group, and using different types of music can have a different appeal to a certain age group. If they want certain people paying attention to their ads, they'll most likely use a song from their generation.
Answer: C. artists and observers have varying ideas of what art is.
Explanation: Everyone has varying opinions on what is classified as art. The subject matter is often taboo as artists try to push the limits and test boundaries.
