While There Is Little Research on the Different Substance Abuse

While there is little research on the different substance abuse prevention programs, what there is on programs such as Project Northland suggests ________

A) they are extremely successful.
B) they are more effective when they use a multicomponent approach.
C) they are effective for children and adolescents who have not already started using.
D) they are effective for non-minority children and adolescents only.