Which of the following is a common criticism of the humanistic perspective?

A) Its concepts are vague and subjective.
B) The emphasis on the self encourages selfishness in individuals.
C) Humanism fails to appreciate the reality of evil in human behavior.
D) All of these are common criticisms.

All three options listed are common criticisms of the humanistic perspective. The belief that the concepts of humanism are vague and subjective is a common criticism. Additionally, some argue that the emphasis on the self can lead to individualism and self-centeredness, rather than promoting empathy and altruism. Finally, some critics argue that humanism fails to consider the reality of evil in human behavior, and may present an overly optimistic view of humanity. Therefore, D is the best choice.