The Principal at the Local Elementary School Is Concerned About

The principal at the local elementary school is concerned about the rejected and neglected children at her school. She explores various intervention programs for helping these children, and she discovers that

A) the majority of effective programs are based on environmental-learning models.
B) privacy is ensured in that other members of the peer group are never included in these intervention programs.
C) these programs are cost effective; most participants benefit, and their effects are long-term.
D) None of the alternatives are correct.