The answer would be B, "<span>Violent crime in the U.S. fell every year until 2004, when digital music players became widespread, leading to a rise in crime" because the logic states that digital music players are the cause of the rise of violent crime.</span>
Natives is usually a sufficient definition, however, it can also refer to someone merely born in a specific state after there parents moved there e.g. "I am a Texas Native."