In 1970 There Were 196,000 Prisoners in State and Federal

In 1970 there were 196,000 prisoners in state and federal prisons in the United States, but by the turn of the century the figure exceeded 2 million and it has been estimated that if current US trends continue, what per cent of all black males born today will spend some of their lives in prison?

A) 0.1
B) 0.2
C) 0.3
D) 0.4
E) 0.5