The Current Rating System for CD and Music Download Lyrics

The current rating system for CD and music download lyrics was instituted:

A) decades before people became concerned about links between listening to music and suicide attempts.
B) shortly before people became concerned about links between listening to music and suicide attempts.
C) coincidentally at about the same time people became concerned about links between listening to music and suicide attempts.
D) in part to address people's concerns about links between listening to music and suicide attempts.