Since 1993, the levels of serious violent crime in the United States have decreased steadily. It is obvious that the heavy focus we place on law enforcement （实施）is no longer necessary. People are becoming civic-minded and are choosing to no longer pursue a life of crime. Money spent on law enforcement can now better be spent elsewhere.

A、Causal oversimplification.

B、Hasty generalization.

C、False analogy.

D、No error.

正确答案：Causal oversimplification.