Which Statement Best Describes the Place of Mafia Groups in Organized

Which statement best describes the place of Mafia groups in organized crime?

A) They dominate the organized crime world, and account for most organized crime.
B) While they play a major role in organized crime, they are by no means the only organized criminals.
C) They are actually a very small group of organized criminals.
D) They operate mostly under the law with only a few discretions, making them hard to prosecute.