Which of the following research topics is too broad?

AThe music industry has a long and colorful history and includes many types of companies and professionals who create, market, and sell music of all genres.

BRecord labels first rose to prominence in the mid-twentieth century and became the largest player in the music business; today, they have less importance in the industry.

CThe life of a rock band's tour manager can be challenging and sometimes difficult, but it is never ...