Final answer:
The magazine that ranks music each week is Billboard, which is known for the c) Billboard Hot 100 chart and other genre-specific charts tracking the popularity of music.
Step-by-step explanation:
The magazine that ranks music each week is Billboard. Billboard is renowned for its music charts, which track the popularity of songs and albums across various genres. The most famous of these is the Billboard Hot 100, which ranks the week's most popular songs across all genres. Whereas magazines like Newsweek cover a broad range of topics including news and politics, Rolling Stone does feature music content but is not primarily known for weekly music rankings. Therefore, among the options provided, C) Billboard is the correct answer to the question.