What Is the Primary Reason for Recent Increases in the U.S

What is the primary reason for recent increases in the U.S. prison population?

A) Policies aimed at stopping drug use and trafficking have led to a large number of arrests.
B) States have built new prisons and must fill them to justify the expense.
C) The rate at which violent crimes occur has increased.
D) The federal government has become more involved in training and funding local law enforcement.
E) Sensationalized television reporting has increased fear of crime among the public.