Question

In the early 2000’s, mp3 players replaced cd players as the preferred portable music player. this shift in demand was likely the result of the

Answer 1

This shift in demand was likely the result of the improved technology of MP3 players.
Improved technology brought improved quality of MP3 players, which meant that more people were interested in buying them. MP3 players are far more convenient than CD players, because they are smaller, more easily portable, and overall better.