According to a report completed by Gookin (2007), nearly ____ have been incarcerated as a result of the SVP laws in the United States since 1990. As of 2007, ____ of them have been released.
a. 250 sex offenders; none
b. 1,000 violent criminals; none
c. 4,500 sex offenders; 10%
d. 100,000 violent criminals; 25%