Research into Risk and Protective Factors Requires Large Samples of Children

Research into risk and protective factors requires large samples of children be studied and multiple areas of functioning be assessed over long periods of time because ____.

A) the areas of child functioning that will be affected are known in advance
B) a high percentage of children who are at risk will develop the disorder
C) the ages at which a disorder may occur or reoccur is not known in advance
D) the risk and protective factor processes take years to develop