Which of the Following Findings Were Associated with Welchan's (2005)

Which of the following findings were associated with Welchan's (2005) meta-analysis of studies designed to measure the effectiveness of sex offender notification and registration?

A) Some sex offenders are not aware of the notification requirement.
B) Some offenders who do know about these requirements fail to comply with the requirement.
C) Eighty percent of treatment providers believe that registration and notification will not protect children from being sexually abused.
D) All of these findings were part of Welchan's conclusions.