Notice that each answer choice has a common theme of violence.
However, choices B (violence in popular music), C (violence in video games), and D (violence on television shows) are concentrated on one area/place where violence is prevalent. They are not very broad.
On the other hand, choice A (violence in society) is probably too broad for a 10 minute speech. There is all sorts of violence in society as a whole and there are too many things to touch in a ten minute time period.
Explanation: Violence in society includes all violence the other answers are just narrowed done from A. and can be done in a 10 minute speech whereas A. is too broad of a topic to cover in 10 minutes.
