Training is designed to combine contingency management techniques with additional techniques that focus on improving parent–child interactions generally—improving communication and facilitating real warmth and positive interest in the parent for his or her child.

"social stratification refers to the way people are ranked and ordered in society. in western societies, stratification is primarily seen and understood as a result of socioeconomic status, which produces a hierarchy in which access to resources, and possession of them, increases from the lower to the upper strata"

it should be d or b but i'm sure it's d

answer; the government can clearly justify the restriction;