Mariah Carey is the correct answer because out of the three options given, she is the only one who is primarily known for her career in music. Mariah Carey is a renowned singer, songwriter, and producer who has achieved great success in the music industry, with numerous chart-topping hits and accolades. On the other hand, Khloe Kardashian and Jennifer Lopez are both known for their work in the entertainment industry, but they are primarily recognized for their involvement in reality TV and acting, respectively.