Which of the Following Statements About the American Prison System

Which of the following statements about the American prison system is LEAST accurate?

A) The crackdown on illicit drugs of the sort often found in poorer communities has resulted in large numbers of prisoners serving long sentences for nonviolent crimes.
B) The job-skills training and educational classes available through the prison systems ironically make ex-convicts from poor neighborhoods more hirable than if they had stayed in school.
C) The number of prisoners incarcerated in the United States has increased by more than two million since 1970.
D) Blacks are imprisoned at higher rates than other groups in part because they are typically placed under closer police surveillance than other groups.